Merge pull request #1045 from ZyX-I/style-fixes

Improve coding style

CONTRIBUTING.rst

@@ -67,6 +67,65 @@ Programming style
   documentation and commit messages.
 * It is allowed to have too long lines. It is advised though to avoid lines 
   wider then a hundred of characters.
+* Imports have the following structure:
+
+  1. Shebang and modeline in a form
+
+     .. code-block:: python
+
+         #!/usr/bin/env python
+         # vim:fileencoding=utf-8:noet
+
+     . Modeline is required, shebang is not. If shebang is present file must end 
+     with
+
+     .. code-block:: python
+
+        if __name__ == '__main__':
+            # Actual script here
+
+  2. Module docstring.
+  3. ``__future__`` import exactly in a form
+
+     .. code-block:: python
+
+         from __future__ import (unicode_literals, division, absolute_import, print_function)
+
+     (powerline.shell is the only exception due to problems with argparse). It 
+     is not separated by newline with shebang and modeline, but is with 
+     docstring.
+  4. Standard python library imports in a form ``import X``.
+  5. Standard python library imports in a form ``from X import Y``.
+  6. Third-party (non-python and non-powerline) library imports in a form 
+     ``import X``.
+  7. Third-party library imports in a form ``from X import Y``.
+  8. Powerline non-test imports in a form ``from powerline.X import Y``.
+  9. Powerline test imports in a form ``import tests.vim as vim_module``.
+  10. Powerline test imports in a form ``from tests.X import Y``.
+
+  Each entry is separated by newline from another entry. Any entry except for 
+  the first and third ones is optional. Example with all entries:
+
+  .. code-block:: python
+
+    #!/usr/bin/env python
+    # vim:fileencoding=utf-8:noet
+
+    '''Powerline super module'''
+
+    import sys
+
+    from argparse import ArgumentParser
+
+    import psutil
+
+    from colormath.color_diff import delta_e_cie2000
+
+    from powerline.lib.unicode import u
+
+    import tests.vim as vim_module
+
+    from tests import TestCase
 
 Submitting changes
 ==================

client/powerline.py

@@ -1,6 +1,5 @@
 #!/usr/bin/env python
 # vim:fileencoding=utf-8:noet
-
 from __future__ import (unicode_literals, division, absolute_import, print_function)
 
 import sys

docs/source/conf.py

@@ -1,8 +1,10 @@
 # vim:fileencoding=utf-8:noet
+from __future__ import (unicode_literals, division, absolute_import, print_function)
 
 import os
 import sys
 
+
 sys.path.insert(0, os.path.dirname(os.path.dirname(os.path.abspath(os.getcwd()))))
 sys.path.insert(0, os.path.abspath(os.getcwd()))
 

docs/source/installation/osx.rst

@@ -17,26 +17,29 @@ Python package
 
    .
 
-.. note::
-    In case you want or have to use ``powerline.sh`` socat-based client you 
-    should also install GNU env named ``genv``. This may be achieved by running 
-    ``brew install coreutils``.
+   .. note::
+      In case you want or have to use ``powerline.sh`` socat-based client you 
+      should also install GNU env named ``genv``. This may be achieved by 
+      running ``brew install coreutils``.
 
 2. Install Powerline using the following command::
 
        pip install --user git+git://github.com/Lokaltog/powerline
 
-.. warning:: When using ``brew install`` to install Python one must not supply
-   ``--user`` flag to ``pip``.
+   .. warning::
+      When using ``brew install`` to install Python one must not supply
+      ``--user`` flag to ``pip``.
 
-.. note:: You need to use the GitHub URI when installing Powerline! This 
-   project is currently unavailable on the PyPI due to a naming conflict 
-   with an unrelated project.
+   .. note::
+      You need to use the GitHub URI when installing Powerline! This project is 
+      currently unavailable on the PyPI due to a naming conflict with an 
+      unrelated project.
 
-.. note:: If you are powerline developer you should be aware that ``pip install 
-   --editable`` does not currently fully work. If you install powerline this way 
-   you will be missing ``powerline`` executable and need to symlink it. It will 
-   be located in ``scripts/powerline``.
+   .. note::
+      If you are powerline developer you should be aware that ``pip install 
+      --editable`` does not currently fully work. If you install powerline this 
+      way you will be missing ``powerline`` executable and need to symlink it. It 
+      will be located in ``scripts/powerline``.
 
 Vim installation
 ================

docs/source/powerline_autodoc.py

@@ -1,13 +1,13 @@
 # vim:fileencoding=utf-8:noet
-from sphinx.ext import autodoc
+from __future__ import (unicode_literals, division, absolute_import, print_function)
+
 from inspect import formatargspec
+
+from sphinx.ext import autodoc
+
 from powerline.lint.inspect import getconfigargspec
 from powerline.segments import Segment
-
-try:
-	from __builtin__ import unicode
-except ImportError:
-	unicode = lambda s, enc: s  # NOQA
+from powerline.lib.unicode import unicode
 
 
 def formatvalue(val):

powerline/__init__.py

@@ -1,6 +1,6 @@
 # vim:fileencoding=utf-8:noet
+from __future__ import (unicode_literals, division, absolute_import, print_function)
 
-from __future__ import absolute_import
 import os
 import sys
 import logging

powerline/bindings/awesome/powerline-awesome.py

@@ -1,11 +1,14 @@
 #!/usr/bin/env python
 # vim:fileencoding=utf-8:noet
+from __future__ import (unicode_literals, division, absolute_import, print_function)
+
+import sys
+
+from time import sleep
+from subprocess import Popen, PIPE
 
 from powerline import Powerline
-import sys
-from time import sleep
 from powerline.lib.monotonic import monotonic
-from subprocess import Popen, PIPE
 
 powerline = Powerline('wm', renderer_module='pango_markup')
 powerline.update_renderer()

powerline/bindings/config.py

@@ -1,6 +1,5 @@
 # vim:fileencoding=utf-8:noet
-
-from __future__ import absolute_import, unicode_literals, print_function
+from __future__ import (unicode_literals, division, absolute_import, print_function)
 
 import os
 import re

powerline/bindings/i3/powerline-i3.py

@@ -1,15 +1,17 @@
 #!/usr/bin/env python
 # vim:fileencoding=utf-8:noet
-from __future__ import print_function
-
-from powerline import Powerline
-from powerline.lib.monotonic import monotonic
+from __future__ import (unicode_literals, division, absolute_import, print_function)
 
 import sys
 import time
-import i3
+
 from threading import Lock
 
+import i3
+
+from powerline import Powerline
+from powerline.lib.monotonic import monotonic
+
 
 if __name__ == '__main__':
 	name = 'wm'

powerline/bindings/ipython/post_0_11.py

@@ -1,12 +1,13 @@
 # vim:fileencoding=utf-8:noet
+from __future__ import (unicode_literals, division, absolute_import, print_function)
 
 from weakref import ref
 
-from powerline.ipython import IPythonPowerline, RewriteResult
-
 from IPython.core.prompts import PromptManager
 from IPython.core.magic import Magics, magics_class, line_magic
 
+from powerline.ipython import IPythonPowerline, RewriteResult
+
 
 @magics_class
 class PowerlineMagics(Magics):

powerline/bindings/ipython/pre_0_11.py

@@ -1,16 +1,17 @@
 # vim:fileencoding=utf-8:noet
+from __future__ import (unicode_literals, division, absolute_import, print_function)
 
 import re
 
 from weakref import ref
 
-from powerline.ipython import IPythonPowerline, RewriteResult
-from powerline.lib.unicode import string
-
 from IPython.Prompts import BasePrompt
 from IPython.ipapi import get as get_ipython
 from IPython.ipapi import TryNext
 
+from powerline.ipython import IPythonPowerline, RewriteResult
+from powerline.lib.unicode import string
+
 
 class IPythonInfo(object):
 	def __init__(self, cache):

powerline/bindings/qtile/widget.py

@@ -1,4 +1,5 @@
 # vim:fileencoding=utf-8:noet
+from __future__ import (unicode_literals, division, absolute_import, print_function)
 
 from libqtile import bar
 from libqtile.widget import base

powerline/bindings/tmux/__init__.py

@@ -1,6 +1,5 @@
 # vim:fileencoding=utf-8:noet
-
-from __future__ import absolute_import, unicode_literals, division, print_function
+from __future__ import (unicode_literals, division, absolute_import, print_function)
 
 import re
 import os

powerline/bindings/vim/__init__.py

@@ -1,4 +1,5 @@
 # vim:fileencoding=utf-8:noet
+from __future__ import (unicode_literals, division, absolute_import, print_function)
 
 import sys
 import codecs
@@ -8,6 +9,10 @@ try:
 except ImportError:
 	vim = {}
 
+if not hasattr(vim, 'bindeval'):
+	import json
+
+
 if hasattr(vim, 'bindeval'):
 	def vim_get_func(f, rettype=None):
 		'''Return a vim function binding.'''
@@ -19,8 +24,6 @@ if hasattr(vim, 'bindeval'):
 		except vim.error:
 			return None
 else:
-	import json
-
 	class VimFunc(object):
 		'''Evaluate a vim function using vim.eval().
 
@@ -73,14 +76,14 @@ else:
 
 	_vim_exists = vim_get_func('exists', rettype=int)
 
-	def vim_getvar(varname):  # NOQA
+	def vim_getvar(varname):
 		varname = 'g:' + varname
 		if _vim_exists(varname):
 			return vim.eval(varname)
 		else:
 			raise KeyError(varname)
 
-	def bufvar_exists(buffer, varname):  # NOQA
+	def bufvar_exists(buffer, varname):
 		if not buffer or buffer.number == vim.current.buffer.number:
 			return int(vim.eval('exists("b:{0}")'.format(varname)))
 		else:
@@ -88,7 +91,7 @@ else:
 				'has_key(getbufvar({0}, ""), {1})'.format(buffer.number, varname)
 			))
 
-	def vim_getwinvar(segment_info, varname):  # NOQA
+	def vim_getwinvar(segment_info, varname):
 		result = vim.eval('getwinvar({0}, "{1}")'.format(segment_info['winnr'], varname))
 		if result == '':
 			if not int(vim.eval('has_key(getwinvar({0}, ""), "{1}")'.format(segment_info['winnr'], varname))):
@@ -122,13 +125,13 @@ if hasattr(vim, 'options'):
 	def vim_setoption(option, value):
 		vim.options[str(option)] = value
 else:
-	def vim_getbufoption(info, option):  # NOQA
+	def vim_getbufoption(info, option):
 		return getbufvar(info['bufnr'], '&' + option)
 
-	def vim_getoption(option):  # NOQA
+	def vim_getoption(option):
 		return vim.eval('&g:' + option)
 
-	def vim_setoption(option, value):  # NOQA
+	def vim_setoption(option, value):
 		vim.command('let &g:{option} = {value}'.format(
 			option=option, value=json.encode(value)))
 
@@ -205,10 +208,10 @@ else:
 	def _last_tab_nr():
 		return int(vim.eval('tabpagenr("$")'))
 
-	def current_tabpage():  # NOQA
+	def current_tabpage():
 		return Tabpage(int(vim.eval('tabpagenr()')))
 
-	def list_tabpages():  # NOQA
+	def list_tabpages():
 		return [Tabpage(nr) for nr in range(1, _last_tab_nr() + 1)]
 
 	class TabBufSegmentInfo(dict):
@@ -258,7 +261,7 @@ if sys.version_info < (3,):
 else:
 	vim_bufname = vim_get_func('bufname')
 
-	def buffer_name(buf):  # NOQA
+	def buffer_name(buf):
 		try:
 			name = buf.name
 		except UnicodeDecodeError:

powerline/bindings/zsh/__init__.py

@@ -1,12 +1,12 @@
 # vim:fileencoding=utf-8:noet
-from __future__ import absolute_import, unicode_literals, division, print_function
+from __future__ import (unicode_literals, division, absolute_import, print_function)
 
 import atexit
 
-import zsh
-
 from weakref import WeakValueDictionary, ref
 
+import zsh
+
 from powerline.shell import ShellPowerline
 from powerline.lib import parsedotval
 from powerline.lib.unicode import unicode

powerline/colorscheme.py

@@ -1,10 +1,9 @@
 # vim:fileencoding=utf-8:noet
+from __future__ import (unicode_literals, division, absolute_import, print_function)
 
 from copy import copy
-try:
-	from __builtin__ import unicode
-except ImportError:
-	unicode = str
+
+from powerline.lib.unicode import unicode
 
 
 DEFAULT_MODE_KEY = None

powerline/config.py

@@ -1,8 +1,9 @@
 # vim:fileencoding=utf-8:noet
+from __future__ import (unicode_literals, division, absolute_import, print_function)
 
-from __future__ import absolute_import, unicode_literals, print_function
 import os
 
+
 POWERLINE_ROOT = os.path.dirname(os.path.dirname(os.path.abspath(__file__)))
 BINDINGS_DIRECTORY = os.path.join(POWERLINE_ROOT, 'powerline', 'bindings')
 TMUX_CONFIG_DIRECTORY = os.path.join(BINDINGS_DIRECTORY, 'tmux')

powerline/ipython.py

@@ -1,4 +1,5 @@
 # vim:fileencoding=utf-8:noet
+from __future__ import (unicode_literals, division, absolute_import, print_function)
 
 from powerline import Powerline
 from powerline.lib import mergedicts

powerline/lib/__init__.py

@@ -1,7 +1,10 @@
 # vim:fileencoding=utf-8:noet
-from functools import wraps
+from __future__ import (unicode_literals, division, absolute_import, print_function)
+
 import json
 
+from functools import wraps
+
 
 REMOVE_THIS_KEY = object()
 

powerline/lib/config.py

@@ -1,15 +1,16 @@
 # vim:fileencoding=utf-8:noet
-
-from powerline.lib.threaded import MultiRunnedThread
-from powerline.lib.watcher import create_file_watcher
-from copy import deepcopy
-
-from threading import Event, Lock
-from collections import defaultdict
+from __future__ import (unicode_literals, division, absolute_import, print_function)
 
 import json
 import codecs
 
+from copy import deepcopy
+from threading import Event, Lock
+from collections import defaultdict
+
+from powerline.lib.threaded import MultiRunnedThread
+from powerline.lib.watcher import create_file_watcher
+
 
 def open_file(path):
 	return codecs.open(path, encoding='utf-8')

powerline/lib/debug.py

@@ -1,5 +1,6 @@
 #!/usr/bin/env python
 # vim:fileencoding=utf-8:noet
+from __future__ import (unicode_literals, division, absolute_import, print_function)
 
 import gc
 import sys

powerline/lib/humanize_bytes.py

@@ -1,6 +1,9 @@
 # vim:fileencoding=utf-8:noet
+from __future__ import (unicode_literals, division, absolute_import, print_function)
 
 from math import log
+
+
 unit_list = tuple(zip(['', 'k', 'M', 'G', 'T', 'P'], [0, 0, 1, 2, 2, 2]))
 
 

powerline/lib/inotify.py

@@ -1,8 +1,5 @@
 # vim:fileencoding=utf-8:noet
-from __future__ import unicode_literals, absolute_import
-
-__copyright__ = '2013, Kovid Goyal <kovid at kovidgoyal.net>'
-__docformat__ = 'restructuredtext en'
+from __future__ import (unicode_literals, division, absolute_import, print_function)
 
 import sys
 import os
@@ -13,6 +10,10 @@ import struct
 from ctypes.util import find_library
 
 
+__copyright__ = '2013, Kovid Goyal <kovid at kovidgoyal.net>'
+__docformat__ = 'restructuredtext en'
+
+
 class INotifyError(Exception):
 	pass
 

powerline/lib/memoize.py

@@ -1,6 +1,8 @@
 # vim:fileencoding=utf-8:noet
+from __future__ import (unicode_literals, division, absolute_import, print_function)
 
 from functools import wraps
+
 from powerline.lib.monotonic import monotonic
 
 
@@ -35,6 +37,6 @@ class memoize(object):
 				cached = self.cache[key] = {
 					'result': func(**kwargs),
 					'time': monotonic(),
-					}
+				}
 			return cached['result']
 		return decorated_function

powerline/lib/monotonic.py

@@ -1,6 +1,5 @@
 # vim:fileencoding=utf-8:noet
-
-from __future__ import division, absolute_import
+from __future__ import (unicode_literals, division, absolute_import, print_function)
 
 try:
 	try:
@@ -10,14 +9,12 @@ try:
 			# >={kernel}-sources-2.6.28
 			from time import CLOCK_MONOTONIC_RAW as CLOCK_ID
 		except ImportError:
-			from time import CLOCK_MONOTONIC as CLOCK_ID  # NOQA
+			from time import CLOCK_MONOTONIC as CLOCK_ID
 
 		monotonic = lambda: clock_gettime(CLOCK_ID)
-
 	except ImportError:
 		# >=python-3.3
-		from time import monotonic  # NOQA
-
+		from time import monotonic
 except ImportError:
 	import ctypes
 	import sys
@@ -28,7 +25,7 @@ except ImportError:
 			GetTickCount64 = ctypes.windll.kernel32.GetTickCount64
 			GetTickCount64.restype = ctypes.c_ulonglong
 
-			def monotonic():  # NOQA
+			def monotonic():
 				return GetTickCount64() / 1000
 
 		elif sys.platform == 'darwin':
@@ -64,7 +61,7 @@ except ImportError:
 			timebase = mach_timebase_info()
 			factor = timebase[0] / timebase[1] * 1e-9
 
-			def monotonic():  # NOQA
+			def monotonic():
 				return mach_absolute_time() * factor
 		else:
 			# linux only (no librt on OS X)
@@ -93,7 +90,7 @@ except ImportError:
 			else:
 				raise OSError
 
-			def monotonic():  # NOQA
+			def monotonic():
 				if clock_gettime(CLOCK_MONOTONIC, ctypes.pointer(tspec)) != 0:
 					errno_ = ctypes.get_errno()
 					raise OSError(errno_, os.strerror(errno_))

powerline/lib/path.py

@@ -1,5 +1,5 @@
 # vim:fileencoding=utf-8:noet
-from __future__ import unicode_literals, absolute_import
+from __future__ import (unicode_literals, division, absolute_import, print_function)
 
 import os
 

powerline/lib/shell.py

@@ -1,12 +1,12 @@
 # vim:fileencoding=utf-8:noet
+from __future__ import (unicode_literals, division, absolute_import, print_function)
 
-from __future__ import absolute_import, unicode_literals, division, print_function
+import sys
+import os
 
 from subprocess import Popen, PIPE
 from locale import getlocale, getdefaultlocale, LC_MESSAGES
 from functools import partial
-import sys
-import os
 
 
 if sys.platform.startswith('win32'):
@@ -68,7 +68,7 @@ try:
 except ImportError:
 	# shutil.which was added in python-3.3. Here is what was added:
 	# Lib/shutil.py, commit 5abe28a9c8fe701ba19b1db5190863384e96c798
-	def which(cmd, mode=os.F_OK | os.X_OK, path=None):  # NOQA
+	def which(cmd, mode=os.F_OK | os.X_OK, path=None):
 		"""Given a command, mode, and a PATH string, return the path which
 		conforms to the given mode on the PATH, or None if there is no such
 		file.

powerline/lib/threaded.py

@@ -1,6 +1,5 @@
 # vim:fileencoding=utf-8:noet
-
-from __future__ import absolute_import
+from __future__ import (unicode_literals, division, absolute_import, print_function)
 
 from threading import Thread, Lock, Event
 from types import MethodType

powerline/lib/unicode.py

@@ -1,5 +1,5 @@
 # vim:fileencoding=utf-8:noet
-
+from __future__ import (unicode_literals, division, absolute_import, print_function)
 
 from locale import getpreferredencoding
 
@@ -7,7 +7,13 @@ from locale import getpreferredencoding
 try:
 	from __builtin__ import unicode
 except ImportError:
-	unicode = str  # NOQA
+	unicode = str
+
+
+try:
+	from __builtin__ import unichr
+except ImportError:
+	unichr = chr
 
 
 def u(s):

powerline/lib/url.py

@@ -1,8 +1,9 @@
 # vim:fileencoding=utf-8:noet
+from __future__ import (unicode_literals, division, absolute_import, print_function)
 
 try:
-	from urllib.error import HTTPError
-	from urllib.request import urlopen
+	from urllib.error import HTTPError  # NOQA
+	from urllib.request import urlopen  # NOQA
 	from urllib.parse import urlencode as urllib_urlencode  # NOQA
 except ImportError:
 	from urllib2 import urlopen, HTTPError  # NOQA

powerline/lib/vcs/__init__.py

@@ -1,8 +1,9 @@
 # vim:fileencoding=utf-8:noet
-from __future__ import absolute_import
+from __future__ import (unicode_literals, division, absolute_import, print_function)
 
 import os
 import errno
+
 from threading import Lock
 from collections import defaultdict
 
@@ -226,7 +227,7 @@ def guess(path, create_watcher):
 					continue
 				try:
 					if vcs not in globals():
-						globals()[vcs] = getattr(__import__('powerline.lib.vcs', fromlist=[vcs]), vcs)
+						globals()[vcs] = getattr(__import__(str('powerline.lib.vcs'), fromlist=[str(vcs)]), str(vcs))
 					return globals()[vcs].Repository(directory, create_watcher)
 				except:
 					pass

powerline/lib/vcs/bzr.py

@@ -1,9 +1,10 @@
 # vim:fileencoding=utf-8:noet
-from __future__ import absolute_import, unicode_literals, division, print_function
+from __future__ import (unicode_literals, division, absolute_import, print_function)
 
 import sys
 import os
 import re
+
 from io import StringIO
 
 from bzrlib import (workingtree, status, library_state, trace, ui)

powerline/lib/vcs/git.py

@@ -1,6 +1,5 @@
 # vim:fileencoding=utf-8:noet
-
-from __future__ import (unicode_literals, absolute_import, print_function)
+from __future__ import (unicode_literals, division, absolute_import, print_function)
 
 import os
 import sys

powerline/lib/vcs/mercurial.py

@@ -1,5 +1,5 @@
 # vim:fileencoding=utf-8:noet
-from __future__ import absolute_import
+from __future__ import (unicode_literals, division, absolute_import, print_function)
 
 import os
 

powerline/lib/watcher/__init__.py

@@ -1,5 +1,5 @@
 # vim:fileencoding=utf-8:noet
-from __future__ import unicode_literals, absolute_import
+from __future__ import (unicode_literals, division, absolute_import, print_function)
 
 import sys
 
@@ -11,8 +11,7 @@ from powerline.lib.inotify import INotifyError
 
 
 def create_file_watcher(pl, watcher_type='auto', expire_time=10):
-	'''
-	Create an object that can watch for changes to specified files
+	'''Create an object that can watch for changes to specified files
 
 	Use ``.__call__()`` method of the returned object to start watching the file 
 	or check whether file has changed since last call.

powerline/lib/watcher/inotify.py

@@ -1,5 +1,5 @@
 # vim:fileencoding=utf-8:noet
-from __future__ import unicode_literals, absolute_import
+from __future__ import (unicode_literals, division, absolute_import, print_function)
 
 import errno
 import os
@@ -213,13 +213,17 @@ class INotifyTreeWatcher(INotify):
 
 	def add_watch(self, path):
 		bpath = path if isinstance(path, bytes) else path.encode(self.fenc)
-		wd = self._add_watch(self._inotify_fd, ctypes.c_char_p(bpath),
-				# Ignore symlinks and watch only directories
-				self.DONT_FOLLOW | self.ONLYDIR |
+		wd = self._add_watch(
+			self._inotify_fd,
+			ctypes.c_char_p(bpath),
 
-				self.MODIFY | self.CREATE | self.DELETE |
-				self.MOVE_SELF | self.MOVED_FROM | self.MOVED_TO |
-				self.ATTRIB | self.DELETE_SELF)
+			# Ignore symlinks and watch only directories
+			self.DONT_FOLLOW | self.ONLYDIR |
+
+			self.MODIFY | self.CREATE | self.DELETE |
+			self.MOVE_SELF | self.MOVED_FROM | self.MOVED_TO |
+			self.ATTRIB | self.DELETE_SELF
+		)
 		if wd == -1:
 			eno = ctypes.get_errno()
 			if eno == errno.ENOTDIR:

powerline/lib/watcher/stat.py

@@ -1,5 +1,5 @@
 # vim:fileencoding=utf-8:noet
-from __future__ import unicode_literals, absolute_import
+from __future__ import (unicode_literals, division, absolute_import, print_function)
 
 import os
 

powerline/lib/watcher/tree.py

@@ -1,5 +1,5 @@
 # vim:fileencoding=utf-8:noet
-from __future__ import (unicode_literals, absolute_import, print_function)
+from __future__ import (unicode_literals, division, absolute_import, print_function)
 
 import sys
 

powerline/lib/watcher/uv.py

@@ -1,14 +1,14 @@
 # vim:fileencoding=utf-8:noet
-from __future__ import (unicode_literals, absolute_import, print_function)
+from __future__ import (unicode_literals, division, absolute_import, print_function)
 
-from powerline.lib.path import realpath
+import os
 
 from collections import defaultdict
 from threading import RLock
 from functools import partial
 from threading import Thread
 
-import os
+from powerline.lib.path import realpath
 
 
 class UvNotFound(NotImplementedError):

powerline/lint/__init__.py

@@ -1,4 +1,5 @@
 # vim:fileencoding=utf-8:noet
+from __future__ import (unicode_literals, division, absolute_import, print_function)
 
 import itertools
 import sys
@@ -560,8 +561,8 @@ def check_top_theme(theme, data, context, echoerr):
 	return True, False, False
 
 
-divider_spec = Spec().type(unicode).len('le', 3,
-					lambda value: 'Divider {0!r} is too large!'.format(value)).copy
+divider_spec = Spec().type(unicode).len(
+	'le', 3, (lambda value: 'Divider {0!r} is too large!'.format(value))).copy
 ext_theme_spec = Spec().type(unicode).func(lambda *args: check_config('themes', *args)).copy
 top_theme_spec = Spec().type(unicode).func(check_top_theme).copy
 ext_spec = Spec(

powerline/lint/inspect.py

@@ -1,5 +1,5 @@
 # vim:fileencoding=utf-8:noet
-from __future__ import absolute_import
+from __future__ import (unicode_literals, division, absolute_import, print_function)
 
 from inspect import ArgSpec, getargspec
 

powerline/lint/markedjson/__init__.py

@@ -1,7 +1,7 @@
-__version__ = '3.10'
+# vim:fileencoding=utf-8:noet
+from __future__ import (unicode_literals, division, absolute_import, print_function)
 
-
-from .loader import Loader
+from powerline.lint.markedjson.loader import Loader
 
 
 def load(stream, Loader=Loader):

powerline/lint/markedjson/composer.py

@@ -1,8 +1,12 @@
-__all__ = ['Composer', 'ComposerError']
+# vim:fileencoding=utf-8:noet
+from __future__ import (unicode_literals, division, absolute_import, print_function)
 
-from .error import MarkedError
-from .events import *  # NOQA
-from .nodes import *  # NOQA
+from powerline.lint.markedjson import nodes
+from powerline.lint.markedjson import events
+from powerline.lint.markedjson.error import MarkedError
+
+
+__all__ = ['Composer', 'ComposerError']
 
 
 class ComposerError(MarkedError):
@@ -15,15 +19,15 @@ class Composer:
 
 	def check_node(self):
 		# Drop the STREAM-START event.
-		if self.check_event(StreamStartEvent):
+		if self.check_event(events.StreamStartEvent):
 			self.get_event()
 
 		# If there are more documents available?
-		return not self.check_event(StreamEndEvent)
+		return not self.check_event(events.StreamEndEvent)
 
 	def get_node(self):
 		# Get the root node of the next document.
-		if not self.check_event(StreamEndEvent):
+		if not self.check_event(events.StreamEndEvent):
 			return self.compose_document()
 
 	def get_single_node(self):
@@ -32,11 +36,11 @@ class Composer:
 
 		# Compose a document if the stream is not empty.
 		document = None
-		if not self.check_event(StreamEndEvent):
+		if not self.check_event(events.StreamEndEvent):
 			document = self.compose_document()
 
 		# Ensure that the stream contains no more documents.
-		if not self.check_event(StreamEndEvent):
+		if not self.check_event(events.StreamEndEvent):
 			event = self.get_event()
 			raise ComposerError(
 				"expected a single document in the stream",
@@ -64,11 +68,11 @@ class Composer:
 
 	def compose_node(self, parent, index):
 		self.descend_resolver(parent, index)
-		if self.check_event(ScalarEvent):
+		if self.check_event(events.ScalarEvent):
 			node = self.compose_scalar_node()
-		elif self.check_event(SequenceStartEvent):
+		elif self.check_event(events.SequenceStartEvent):
 			node = self.compose_sequence_node()
-		elif self.check_event(MappingStartEvent):
+		elif self.check_event(events.MappingStartEvent):
 			node = self.compose_mapping_node()
 		self.ascend_resolver()
 		return node
@@ -77,18 +81,18 @@ class Composer:
 		event = self.get_event()
 		tag = event.tag
 		if tag is None or tag == '!':
-			tag = self.resolve(ScalarNode, event.value, event.implicit, event.start_mark)
-		node = ScalarNode(tag, event.value, event.start_mark, event.end_mark, style=event.style)
+			tag = self.resolve(nodes.ScalarNode, event.value, event.implicit, event.start_mark)
+		node = nodes.ScalarNode(tag, event.value, event.start_mark, event.end_mark, style=event.style)
 		return node
 
 	def compose_sequence_node(self):
 		start_event = self.get_event()
 		tag = start_event.tag
 		if tag is None or tag == '!':
-			tag = self.resolve(SequenceNode, None, start_event.implicit)
-		node = SequenceNode(tag, [], start_event.start_mark, None, flow_style=start_event.flow_style)
+			tag = self.resolve(nodes.SequenceNode, None, start_event.implicit)
+		node = nodes.SequenceNode(tag, [], start_event.start_mark, None, flow_style=start_event.flow_style)
 		index = 0
-		while not self.check_event(SequenceEndEvent):
+		while not self.check_event(events.SequenceEndEvent):
 			node.value.append(self.compose_node(node, index))
 			index += 1
 		end_event = self.get_event()
@@ -99,9 +103,9 @@ class Composer:
 		start_event = self.get_event()
 		tag = start_event.tag
 		if tag is None or tag == '!':
-			tag = self.resolve(MappingNode, None, start_event.implicit)
-		node = MappingNode(tag, [], start_event.start_mark, None, flow_style=start_event.flow_style)
-		while not self.check_event(MappingEndEvent):
+			tag = self.resolve(nodes.MappingNode, None, start_event.implicit)
+		node = nodes.MappingNode(tag, [], start_event.start_mark, None, flow_style=start_event.flow_style)
+		while not self.check_event(events.MappingEndEvent):
 			# key_event = self.peek_event()
 			item_key = self.compose_node(node, None)
 			# if item_key in node.value:

powerline/lint/markedjson/constructor.py

@@ -1,19 +1,16 @@
-__all__ = ['BaseConstructor', 'Constructor', 'ConstructorError']
-
-from .error import MarkedError
-from .nodes import *  # NOQA
-from .markedvalue import gen_marked_value
+# vim:fileencoding=utf-8:noet
+from __future__ import (unicode_literals, division, absolute_import, print_function)
 
 import collections
 import types
 
 from functools import wraps
 
+from powerline.lint.markedjson.error import MarkedError
 
-try:
-	from __builtin__ import unicode
-except ImportError:
-	unicode = str  # NOQA
+from powerline.lint.markedjson import nodes
+from powerline.lint.markedjson.markedvalue import gen_marked_value
+from powerline.lib.unicode import unicode
 
 
 def marked(func):
@@ -94,7 +91,7 @@ class BaseConstructor:
 
 	@marked
 	def construct_scalar(self, node):
-		if not isinstance(node, ScalarNode):
+		if not isinstance(node, nodes.ScalarNode):
 			raise ConstructorError(
 				None, None,
 				"expected a scalar node, but found %s" % node.id,
@@ -103,7 +100,7 @@ class BaseConstructor:
 		return node.value
 
 	def construct_sequence(self, node, deep=False):
-		if not isinstance(node, SequenceNode):
+		if not isinstance(node, nodes.SequenceNode):
 			raise ConstructorError(
 				None, None,
 				"expected a sequence node, but found %s" % node.id,
@@ -116,7 +113,7 @@ class BaseConstructor:
 
 	@marked
 	def construct_mapping(self, node, deep=False):
-		if not isinstance(node, MappingNode):
+		if not isinstance(node, nodes.MappingNode):
 			raise ConstructorError(
 				None, None,
 				"expected a mapping node, but found %s" % node.id,
@@ -156,7 +153,7 @@ class BaseConstructor:
 
 class Constructor(BaseConstructor):
 	def construct_scalar(self, node):
-		if isinstance(node, MappingNode):
+		if isinstance(node, nodes.MappingNode):
 			for key_node, value_node in node.value:
 				if key_node.tag == 'tag:yaml.org,2002:value':
 					return self.construct_scalar(value_node)
@@ -169,13 +166,13 @@ class Constructor(BaseConstructor):
 			key_node, value_node = node.value[index]
 			if key_node.tag == 'tag:yaml.org,2002:merge':
 				del node.value[index]
-				if isinstance(value_node, MappingNode):
+				if isinstance(value_node, nodes.MappingNode):
 					self.flatten_mapping(value_node)
 					merge.extend(value_node.value)
-				elif isinstance(value_node, SequenceNode):
+				elif isinstance(value_node, nodes.SequenceNode):
 					submerge = []
 					for subnode in value_node.value:
-						if not isinstance(subnode, MappingNode):
+						if not isinstance(subnode, nodes.MappingNode):
 							raise ConstructorError(
 								"while constructing a mapping",
 								node.start_mark,
@@ -203,7 +200,7 @@ class Constructor(BaseConstructor):
 			node.value = merge + node.value
 
 	def construct_mapping(self, node, deep=False):
-		if isinstance(node, MappingNode):
+		if isinstance(node, nodes.MappingNode):
 			self.flatten_mapping(node)
 		return BaseConstructor.construct_mapping(self, node, deep=deep)
 
@@ -264,32 +261,25 @@ class Constructor(BaseConstructor):
 
 
 Constructor.add_constructor(
-		'tag:yaml.org,2002:null',
-		Constructor.construct_yaml_null)
+	'tag:yaml.org,2002:null', Constructor.construct_yaml_null)
 
 Constructor.add_constructor(
-		'tag:yaml.org,2002:bool',
-		Constructor.construct_yaml_bool)
+	'tag:yaml.org,2002:bool', Constructor.construct_yaml_bool)
 
 Constructor.add_constructor(
-		'tag:yaml.org,2002:int',
-		Constructor.construct_yaml_int)
+	'tag:yaml.org,2002:int', Constructor.construct_yaml_int)
 
 Constructor.add_constructor(
-		'tag:yaml.org,2002:float',
-		Constructor.construct_yaml_float)
+	'tag:yaml.org,2002:float', Constructor.construct_yaml_float)
 
 Constructor.add_constructor(
-		'tag:yaml.org,2002:str',
-		Constructor.construct_yaml_str)
+	'tag:yaml.org,2002:str', Constructor.construct_yaml_str)
 
 Constructor.add_constructor(
-		'tag:yaml.org,2002:seq',
-		Constructor.construct_yaml_seq)
+	'tag:yaml.org,2002:seq', Constructor.construct_yaml_seq)
 
 Constructor.add_constructor(
-		'tag:yaml.org,2002:map',
-		Constructor.construct_yaml_map)
+	'tag:yaml.org,2002:map', Constructor.construct_yaml_map)
 
-Constructor.add_constructor(None,
-		Constructor.construct_undefined)
+Constructor.add_constructor(
+	None, Constructor.construct_undefined)

powerline/lint/markedjson/error.py

@@ -1,13 +1,10 @@
-__all__ = ['Mark', 'MarkedError', 'echoerr', 'NON_PRINTABLE']
-
+# vim:fileencoding=utf-8:noet
+from __future__ import (unicode_literals, division, absolute_import, print_function)
 
 import sys
 import re
 
-try:
-	from __builtin__ import unichr
-except ImportError:
-	unichr = chr  # NOQA
+from powerline.lib.unicode import unichr
 
 
 NON_PRINTABLE = re.compile('[^\t\n\x20-\x7E' + unichr(0x85) + (unichr(0xA0) + '-' + unichr(0xD7FF)) + (unichr(0xE000) + '-' + unichr(0xFFFD)) + ']')

powerline/lint/markedjson/events.py

@@ -1,6 +1,8 @@
+# vim:fileencoding=utf-8:noet
+from __future__ import (unicode_literals, division, absolute_import, print_function)
+
+
 # Abstract classes.
-
-
 class Event(object):
 	def __init__(self, start_mark=None, end_mark=None):
 		self.start_mark = start_mark
@@ -38,8 +40,6 @@ class CollectionEndEvent(Event):
 
 
 # Implementations.
-
-
 class StreamStartEvent(Event):
 	def __init__(self, start_mark=None, end_mark=None, encoding=None):
 		self.start_mark = start_mark

powerline/lint/markedjson/loader.py

@@ -1,12 +1,13 @@
-__all__ = ['Loader']
+# vim:fileencoding=utf-8:noet
+from __future__ import (unicode_literals, division, absolute_import, print_function)
 
-from .reader import Reader
-from .scanner import Scanner
-from .parser import Parser
-from .composer import Composer
-from .constructor import Constructor
-from .resolver import Resolver
-from .error import echoerr
+from powerline.lint.markedjson.reader import Reader
+from powerline.lint.markedjson.scanner import Scanner
+from powerline.lint.markedjson.parser import Parser
+from powerline.lint.markedjson.composer import Composer
+from powerline.lint.markedjson.constructor import Constructor
+from powerline.lint.markedjson.resolver import Resolver
+from powerline.lint.markedjson.error import echoerr
 
 
 class Loader(Reader, Scanner, Parser, Composer, Constructor, Resolver):

powerline/lint/markedjson/markedvalue.py

@@ -1,10 +1,7 @@
-__all__ = ['gen_marked_value', 'MarkedValue']
+# vim:fileencoding=utf-8:noet
+from __future__ import (unicode_literals, division, absolute_import, print_function)
 
-
-try:
-	from __builtin__ import unicode
-except ImportError:
-	unicode = str
+from powerline.lib.unicode import unicode
 
 
 def gen_new(cls):

powerline/lint/markedjson/nodes.py

@@ -1,3 +1,7 @@
+# vim:fileencoding=utf-8:noet
+from __future__ import (unicode_literals, division, absolute_import, print_function)
+
+
 class Node(object):
 	def __init__(self, tag, value, start_mark, end_mark):
 		self.tag = tag

powerline/lint/markedjson/parser.py

@@ -1,8 +1,9 @@
-__all__ = ['Parser', 'ParserError']
+# vim:fileencoding=utf-8:noet
+from __future__ import (unicode_literals, division, absolute_import, print_function)
 
-from .error import MarkedError
-from .tokens import *  # NOQA
-from .events import *  # NOQA
+from powerline.lint.markedjson.error import MarkedError
+from powerline.lint.markedjson import tokens
+from powerline.lint.markedjson import events
 
 
 class ParserError(MarkedError):
@@ -58,7 +59,7 @@ class Parser:
 	def parse_stream_start(self):
 		# Parse the stream start.
 		token = self.get_token()
-		event = StreamStartEvent(token.start_mark, token.end_mark, encoding=token.encoding)
+		event = events.StreamStartEvent(token.start_mark, token.end_mark, encoding=token.encoding)
 
 		# Prepare the next state.
 		self.state = self.parse_implicit_document_start
@@ -67,10 +68,10 @@ class Parser:
 
 	def parse_implicit_document_start(self):
 		# Parse an implicit document.
-		if not self.check_token(StreamEndToken):
+		if not self.check_token(tokens.StreamEndToken):
 			token = self.peek_token()
 			start_mark = end_mark = token.start_mark
-			event = DocumentStartEvent(start_mark, end_mark, explicit=False)
+			event = events.DocumentStartEvent(start_mark, end_mark, explicit=False)
 
 			# Prepare the next state.
 			self.states.append(self.parse_document_end)
@@ -83,17 +84,17 @@ class Parser:
 
 	def parse_document_start(self):
 		# Parse an explicit document.
-		if not self.check_token(StreamEndToken):
+		if not self.check_token(tokens.StreamEndToken):
 			token = self.peek_token()
 			self.echoerr(
 				None, None,
 				("expected '<stream end>', but found %r" % token.id), token.start_mark
 			)
-			return StreamEndEvent(token.start_mark, token.end_mark)
+			return events.StreamEndEvent(token.start_mark, token.end_mark)
 		else:
 			# Parse the end of the stream.
 			token = self.get_token()
-			event = StreamEndEvent(token.start_mark, token.end_mark)
+			event = events.StreamEndEvent(token.start_mark, token.end_mark)
 			assert not self.states
 			assert not self.marks
 			self.state = None
@@ -104,7 +105,7 @@ class Parser:
 		token = self.peek_token()
 		start_mark = end_mark = token.start_mark
 		explicit = False
-		event = DocumentEndEvent(start_mark, end_mark, explicit=explicit)
+		event = events.DocumentEndEvent(start_mark, end_mark, explicit=explicit)
 
 		# Prepare the next state.
 		self.state = self.parse_document_start
@@ -120,22 +121,22 @@ class Parser:
 			start_mark = end_mark = self.peek_token().start_mark
 		event = None
 		implicit = True
-		if self.check_token(ScalarToken):
+		if self.check_token(tokens.ScalarToken):
 			token = self.get_token()
 			end_mark = token.end_mark
 			if token.plain:
 				implicit = (True, False)
 			else:
 				implicit = (False, True)
-			event = ScalarEvent(implicit, token.value, start_mark, end_mark, style=token.style)
+			event = events.ScalarEvent(implicit, token.value, start_mark, end_mark, style=token.style)
 			self.state = self.states.pop()
-		elif self.check_token(FlowSequenceStartToken):
+		elif self.check_token(tokens.FlowSequenceStartToken):
 			end_mark = self.peek_token().end_mark
-			event = SequenceStartEvent(implicit, start_mark, end_mark, flow_style=True)
+			event = events.SequenceStartEvent(implicit, start_mark, end_mark, flow_style=True)
 			self.state = self.parse_flow_sequence_first_entry
-		elif self.check_token(FlowMappingStartToken):
+		elif self.check_token(tokens.FlowMappingStartToken):
 			end_mark = self.peek_token().end_mark
-			event = MappingStartEvent(implicit, start_mark, end_mark, flow_style=True)
+			event = events.MappingStartEvent(implicit, start_mark, end_mark, flow_style=True)
 			self.state = self.parse_flow_mapping_first_key
 		else:
 			token = self.peek_token()
@@ -152,11 +153,11 @@ class Parser:
 		return self.parse_flow_sequence_entry(first=True)
 
 	def parse_flow_sequence_entry(self, first=False):
-		if not self.check_token(FlowSequenceEndToken):
+		if not self.check_token(tokens.FlowSequenceEndToken):
 			if not first:
-				if self.check_token(FlowEntryToken):
+				if self.check_token(tokens.FlowEntryToken):
 					self.get_token()
-					if self.check_token(FlowSequenceEndToken):
+					if self.check_token(tokens.FlowSequenceEndToken):
 						token = self.peek_token()
 						self.echoerr(
 							"While parsing a flow sequence", self.marks[-1],
@@ -169,11 +170,11 @@ class Parser:
 						("expected ',' or ']', but got %r" % token.id), token.start_mark
 					)
 
-			if not self.check_token(FlowSequenceEndToken):
+			if not self.check_token(tokens.FlowSequenceEndToken):
 				self.states.append(self.parse_flow_sequence_entry)
 				return self.parse_node()
 		token = self.get_token()
-		event = SequenceEndEvent(token.start_mark, token.end_mark)
+		event = events.SequenceEndEvent(token.start_mark, token.end_mark)
 		self.state = self.states.pop()
 		self.marks.pop()
 		return event
@@ -181,7 +182,7 @@ class Parser:
 	def parse_flow_sequence_entry_mapping_end(self):
 		self.state = self.parse_flow_sequence_entry
 		token = self.peek_token()
-		return MappingEndEvent(token.start_mark, token.start_mark)
+		return events.MappingEndEvent(token.start_mark, token.start_mark)
 
 	def parse_flow_mapping_first_key(self):
 		token = self.get_token()
@@ -189,11 +190,11 @@ class Parser:
 		return self.parse_flow_mapping_key(first=True)
 
 	def parse_flow_mapping_key(self, first=False):
-		if not self.check_token(FlowMappingEndToken):
+		if not self.check_token(tokens.FlowMappingEndToken):
 			if not first:
-				if self.check_token(FlowEntryToken):
+				if self.check_token(tokens.FlowEntryToken):
 					self.get_token()
-					if self.check_token(FlowMappingEndToken):
+					if self.check_token(tokens.FlowMappingEndToken):
 						token = self.peek_token()
 						self.echoerr(
 							"While parsing a flow mapping", self.marks[-1],
@@ -205,9 +206,9 @@ class Parser:
 						"while parsing a flow mapping", self.marks[-1],
 						("expected ',' or '}', but got %r" % token.id), token.start_mark
 					)
-			if self.check_token(KeyToken):
+			if self.check_token(tokens.KeyToken):
 				token = self.get_token()
-				if not self.check_token(ValueToken, FlowEntryToken, FlowMappingEndToken):
+				if not self.check_token(tokens.ValueToken, tokens.FlowEntryToken, tokens.FlowMappingEndToken):
 					self.states.append(self.parse_flow_mapping_value)
 					return self.parse_node()
 				else:
@@ -216,12 +217,12 @@ class Parser:
 						"while parsing a flow mapping", self.marks[-1],
 						("expected value, but got %r" % token.id), token.start_mark
 					)
-			elif not self.check_token(FlowMappingEndToken):
+			elif not self.check_token(tokens.FlowMappingEndToken):
 				token = self.peek_token()
-				expect_key = self.check_token(ValueToken, FlowEntryToken)
+				expect_key = self.check_token(tokens.ValueToken, tokens.FlowEntryToken)
 				if not expect_key:
 					self.get_token()
-					expect_key = self.check_token(ValueToken)
+					expect_key = self.check_token(tokens.ValueToken)
 
 				if expect_key:
 					raise ParserError(
@@ -235,15 +236,15 @@ class Parser:
 						("expected ':', but got %r" % token.id), token.start_mark
 					)
 		token = self.get_token()
-		event = MappingEndEvent(token.start_mark, token.end_mark)
+		event = events.MappingEndEvent(token.start_mark, token.end_mark)
 		self.state = self.states.pop()
 		self.marks.pop()
 		return event
 
 	def parse_flow_mapping_value(self):
-		if self.check_token(ValueToken):
+		if self.check_token(tokens.ValueToken):
 			token = self.get_token()
-			if not self.check_token(FlowEntryToken, FlowMappingEndToken):
+			if not self.check_token(tokens.FlowEntryToken, tokens.FlowMappingEndToken):
 				self.states.append(self.parse_flow_mapping_key)
 				return self.parse_node()
 

powerline/lint/markedjson/reader.py

@@ -1,16 +1,14 @@
-# This module contains abstractions for the input stream. You don't have to
-# looks further, there are no pretty code.
-
-__all__ = ['Reader', 'ReaderError']
-
-from .error import MarkedError, Mark, NON_PRINTABLE
+# vim:fileencoding=utf-8:noet
+from __future__ import (unicode_literals, division, absolute_import, print_function)
 
 import codecs
 
-try:
-	from __builtin__ import unicode
-except ImportError:
-	unicode = str  # NOQA
+from powerline.lint.markedjson.error import MarkedError, Mark, NON_PRINTABLE
+from powerline.lib.unicode import unicode
+
+
+# This module contains abstractions for the input stream. You don't have to
+# looks further, there are no pretty code.
 
 
 class ReaderError(MarkedError):

powerline/lint/markedjson/resolver.py

@@ -1,10 +1,11 @@
-__all__ = ['BaseResolver', 'Resolver']
-
-from .error import MarkedError
-from .nodes import *  # NOQA
+# vim:fileencoding=utf-8:noet
+from __future__ import (unicode_literals, division, absolute_import, print_function)
 
 import re
 
+from powerline.lint.markedjson.error import MarkedError
+from powerline.lint.markedjson import nodes
+
 
 class ResolverError(MarkedError):
 	pass
@@ -73,7 +74,7 @@ class BaseResolver:
 			and current_index is None):
 			return
 		if isinstance(index_check, str):
-			if not (isinstance(current_index, ScalarNode) and index_check == current_index.value):
+			if not (isinstance(current_index, nodes.ScalarNode) and index_check == current_index.value):
 				return
 		elif isinstance(index_check, int) and not isinstance(index_check, bool):
 			if index_check != current_index:
@@ -81,7 +82,7 @@ class BaseResolver:
 		return True
 
 	def resolve(self, kind, value, implicit, mark=None):
-		if kind is ScalarNode and implicit[0]:
+		if kind is nodes.ScalarNode and implicit[0]:
 			if value == '':
 				resolvers = self.yaml_implicit_resolvers.get('', [])
 			else:
@@ -97,11 +98,11 @@ class BaseResolver:
 					mark
 				)
 				return self.DEFAULT_SCALAR_TAG
-		if kind is ScalarNode:
+		if kind is nodes.ScalarNode:
 			return self.DEFAULT_SCALAR_TAG
-		elif kind is SequenceNode:
+		elif kind is nodes.SequenceNode:
 			return self.DEFAULT_SEQUENCE_TAG
-		elif kind is MappingNode:
+		elif kind is nodes.MappingNode:
 			return self.DEFAULT_MAPPING_TAG
 
 
@@ -110,21 +111,21 @@ class Resolver(BaseResolver):
 
 
 Resolver.add_implicit_resolver(
-		'tag:yaml.org,2002:bool',
-		re.compile(r'''^(?:true|false)$''', re.X),
-		list('yYnNtTfFoO'))
+	'tag:yaml.org,2002:bool',
+	re.compile(r'''^(?:true|false)$''', re.X),
+	list('yYnNtTfFoO'))
 
 Resolver.add_implicit_resolver(
-		'tag:yaml.org,2002:float',
-		re.compile(r'^-?(?:0|[1-9]\d*)(?=[.eE])(?:\.\d+)?(?:[eE][-+]?\d+)?$', re.X),
-		list('-0123456789'))
+	'tag:yaml.org,2002:float',
+	re.compile(r'^-?(?:0|[1-9]\d*)(?=[.eE])(?:\.\d+)?(?:[eE][-+]?\d+)?$', re.X),
+	list('-0123456789'))
 
 Resolver.add_implicit_resolver(
-		'tag:yaml.org,2002:int',
-		re.compile(r'^(?:0|-?[1-9]\d*)$', re.X),
-		list('-0123456789'))
+	'tag:yaml.org,2002:int',
+	re.compile(r'^(?:0|-?[1-9]\d*)$', re.X),
+	list('-0123456789'))
 
 Resolver.add_implicit_resolver(
-		'tag:yaml.org,2002:null',
-		re.compile(r'^null$', re.X),
-		['n'])
+	'tag:yaml.org,2002:null',
+	re.compile(r'^null$', re.X),
+	['n'])

powerline/lint/markedjson/scanner.py

@@ -1,3 +1,11 @@
+# vim:fileencoding=utf-8:noet
+from __future__ import (unicode_literals, division, absolute_import, print_function)
+
+from powerline.lint.markedjson.error import MarkedError
+from powerline.lint.markedjson import tokens
+from powerline.lib.unicode import unicode
+
+
 # Scanner produces tokens of the following types:
 # STREAM-START
 # STREAM-END
@@ -14,22 +22,11 @@
 #
 # Read comments in the Scanner code for more details.
 
-__all__ = ['Scanner', 'ScannerError']
-
-from .error import MarkedError
-from .tokens import *  # NOQA
-
 
 class ScannerError(MarkedError):
 	pass
 
 
-try:
-	from __builtin__ import unicode
-except ImportError:
-	unicode = str  # NOQA
-
-
 class SimpleKey:
 	# See below simple keys treatment.
 	def __init__(self, token_number, index, line, column, mark):
@@ -241,8 +238,7 @@ class Scanner:
 		mark = self.get_mark()
 
 		# Add STREAM-START.
-		self.tokens.append(StreamStartToken(mark, mark,
-			encoding=self.encoding))
+		self.tokens.append(tokens.StreamStartToken(mark, mark, encoding=self.encoding))
 
 	def fetch_stream_end(self):
 		# Reset simple keys.
@@ -254,19 +250,18 @@ class Scanner:
 		mark = self.get_mark()
 
 		# Add STREAM-END.
-		self.tokens.append(StreamEndToken(mark, mark))
+		self.tokens.append(tokens.StreamEndToken(mark, mark))
 
 		# The steam is finished.
 		self.done = True
 
 	def fetch_flow_sequence_start(self):
-		self.fetch_flow_collection_start(FlowSequenceStartToken)
+		self.fetch_flow_collection_start(tokens.FlowSequenceStartToken)
 
 	def fetch_flow_mapping_start(self):
-		self.fetch_flow_collection_start(FlowMappingStartToken)
+		self.fetch_flow_collection_start(tokens.FlowMappingStartToken)
 
 	def fetch_flow_collection_start(self, TokenClass):
-
 		# '[' and '{' may start a simple key.
 		self.save_possible_simple_key()
 
@@ -283,13 +278,12 @@ class Scanner:
 		self.tokens.append(TokenClass(start_mark, end_mark))
 
 	def fetch_flow_sequence_end(self):
-		self.fetch_flow_collection_end(FlowSequenceEndToken)
+		self.fetch_flow_collection_end(tokens.FlowSequenceEndToken)
 
 	def fetch_flow_mapping_end(self):
-		self.fetch_flow_collection_end(FlowMappingEndToken)
+		self.fetch_flow_collection_end(tokens.FlowMappingEndToken)
 
 	def fetch_flow_collection_end(self, TokenClass):
-
 		# Reset possible simple key on the current level.
 		self.remove_possible_simple_key()
 
@@ -312,7 +306,7 @@ class Scanner:
 			# Add KEY.
 			key = self.possible_simple_keys[self.flow_level]
 			del self.possible_simple_keys[self.flow_level]
-			self.tokens.insert(key.token_number - self.tokens_taken, KeyToken(key.mark, key.mark))
+			self.tokens.insert(key.token_number - self.tokens_taken, tokens.KeyToken(key.mark, key.mark))
 
 			# There cannot be two simple keys one after another.
 			self.allow_simple_key = False
@@ -321,10 +315,9 @@ class Scanner:
 		start_mark = self.get_mark()
 		self.forward()
 		end_mark = self.get_mark()
-		self.tokens.append(ValueToken(start_mark, end_mark))
+		self.tokens.append(tokens.ValueToken(start_mark, end_mark))
 
 	def fetch_flow_entry(self):
-
 		# Simple keys are allowed after ','.
 		self.allow_simple_key = True
 
@@ -335,7 +328,7 @@ class Scanner:
 		start_mark = self.get_mark()
 		self.forward()
 		end_mark = self.get_mark()
-		self.tokens.append(FlowEntryToken(start_mark, end_mark))
+		self.tokens.append(tokens.FlowEntryToken(start_mark, end_mark))
 
 	def fetch_double(self):
 		# A flow scalar could be a simple key.
@@ -385,7 +378,7 @@ class Scanner:
 			chunks.extend(self.scan_flow_scalar_non_spaces(start_mark))
 		self.forward()
 		end_mark = self.get_mark()
-		return ScalarToken(unicode().join(chunks), False, start_mark, end_mark, '"')
+		return tokens.ScalarToken(unicode().join(chunks), False, start_mark, end_mark, '"')
 
 	ESCAPE_REPLACEMENTS = {
 		'b': '\x08',
@@ -480,4 +473,4 @@ class Scanner:
 			chunks.append(self.prefix(length))
 			self.forward(length)
 		end_mark = self.get_mark()
-		return ScalarToken(''.join(chunks), True, start_mark, end_mark)
+		return tokens.ScalarToken(''.join(chunks), True, start_mark, end_mark)

powerline/lint/markedjson/tokens.py

@@ -1,3 +1,7 @@
+# vim:fileencoding=utf-8:noet
+from __future__ import (unicode_literals, division, absolute_import, print_function)
+
+
 class Token(object):
 	def __init__(self, start_mark, end_mark):
 		self.start_mark = start_mark

powerline/listers/vim.py

@@ -1,14 +1,13 @@
 # vim:fileencoding=utf-8:noet
+from __future__ import (unicode_literals, division, absolute_import, print_function)
 
-from __future__ import unicode_literals, absolute_import, division
+from powerline.theme import requires_segment_info
+from powerline.bindings.vim import (current_tabpage, list_tabpages, vim_getbufoption)
 
 try:
 	import vim
 except ImportError:
-	vim = {}  # NOQA
-
-from powerline.theme import requires_segment_info
-from powerline.bindings.vim import (current_tabpage, list_tabpages, vim_getbufoption)
+	vim = {}
 
 
 def tabpage_updated_segment_info(segment_info, tabpage, mode):

powerline/matchers/__init__.py

@@ -1,2 +1,6 @@
+# vim:fileencoding=utf-8:noet
+from __future__ import (unicode_literals, division, absolute_import, print_function)
 from pkgutil import extend_path
+
+
 __path__ = extend_path(__path__, __name__)

powerline/matchers/vim/__init__.py

@@ -1,8 +1,8 @@
 # vim:fileencoding=utf-8:noet
-
-from __future__ import absolute_import
+from __future__ import (unicode_literals, division, absolute_import, print_function)
 
 import os
+
 from powerline.bindings.vim import vim_getbufoption
 
 

powerline/matchers/vim/plugin/__init__.py

@@ -1,2 +1,6 @@
+# vim:fileencoding=utf-8:noet
+from __future__ import (unicode_literals, division, absolute_import, print_function)
 from pkgutil import extend_path
+
+
 __path__ = extend_path(__path__, __name__)

powerline/matchers/vim/plugin/ctrlp.py

@@ -1,22 +1,28 @@
 # vim:fileencoding=utf-8:noet
+from __future__ import (unicode_literals, division, absolute_import, print_function)
 
 import os
+
 try:
 	import vim
-
-	vim.command('''function! Powerline_plugin_ctrlp_main(...)
+except ImportError:
+	vim = object()
+else:
+	vim.command('''
+	function! Powerline_plugin_ctrlp_main(...)
 		let b:powerline_ctrlp_type = 'main'
 		let b:powerline_ctrlp_args = a:000
 	endfunction''')
 
-	vim.command('''function! Powerline_plugin_ctrlp_prog(...)
+	vim.command('''
+	function! Powerline_plugin_ctrlp_prog(...)
 		let b:powerline_ctrlp_type = 'prog'
 		let b:powerline_ctrlp_args = a:000
 	endfunction''')
 
-	vim.command('''let g:ctrlp_status_func = { 'main': 'Powerline_plugin_ctrlp_main', 'prog': 'Powerline_plugin_ctrlp_prog' }''')
-except ImportError:
-	vim = object()  # NOQA
+	vim.command('''
+		let g:ctrlp_status_func = {'main': 'Powerline_plugin_ctrlp_main', 'prog': 'Powerline_plugin_ctrlp_prog'}
+	''')
 
 
 def ctrlp(matcher_info):

powerline/matchers/vim/plugin/gundo.py

@@ -1,4 +1,5 @@
 # vim:fileencoding=utf-8:noet
+from __future__ import (unicode_literals, division, absolute_import, print_function)
 
 import os
 

powerline/matchers/vim/plugin/nerdtree.py

@@ -1,4 +1,5 @@
 # vim:fileencoding=utf-8:noet
+from __future__ import (unicode_literals, division, absolute_import, print_function)
 
 import os
 import re

powerline/renderer.py

@@ -1,4 +1,5 @@
 # vim:fileencoding=utf-8:noet
+from __future__ import (unicode_literals, division, absolute_import, print_function)
 
 import os
 
@@ -6,16 +7,10 @@ from unicodedata import east_asian_width, combining
 from itertools import chain
 
 from powerline.theme import Theme
+from powerline.lib.unicode import unichr
 
-try:
-	NBSP = unicode(' ', 'utf-8')
-except NameError:
-	NBSP = ' '
 
-try:
-	from __builtin__ import unichr as chr
-except ImportError:
-	pass
+NBSP = ' '
 
 
 def construct_returned_value(rendered_highlighted, segments, width, output_raw, output_width):
@@ -80,7 +75,7 @@ class Renderer(object):
 	See documentation of ``unicode.translate`` for details.
 	'''
 
-	np_character_translations = dict(((i, '^' + chr(i + 0x40)) for i in range(0x20)))
+	np_character_translations = dict(((i, '^' + unichr(i + 0x40)) for i in range(0x20)))
 	'''Non-printable character translations
 
 	These are used to transform characters in range 0x00—0x1F into ``^@``, 

powerline/renderers/i3bar.py

@@ -1,7 +1,9 @@
 # vim:fileencoding=utf-8:noet
+from __future__ import (unicode_literals, division, absolute_import, print_function)
+
+import json
 
 from powerline.renderer import Renderer
-import json
 
 
 class I3barRenderer(Renderer):

powerline/renderers/ipython/__init__.py

@@ -1,4 +1,5 @@
 # vim:fileencoding=utf-8:noet
+from __future__ import (unicode_literals, division, absolute_import, print_function)
 
 from powerline.renderers.shell import ShellRenderer
 from powerline.theme import Theme

powerline/renderers/pango_markup.py

@@ -1,10 +1,11 @@
 # vim:fileencoding=utf-8:noet
+from __future__ import (unicode_literals, division, absolute_import, print_function)
+
+from xml.sax.saxutils import escape as _escape
 
 from powerline.renderer import Renderer
 from powerline.colorscheme import ATTR_BOLD, ATTR_ITALIC, ATTR_UNDERLINE
 
-from xml.sax.saxutils import escape as _escape
-
 
 class PangoMarkupRenderer(Renderer):
 	'''Powerline Pango markup segment renderer.'''

powerline/renderers/shell/__init__.py

@@ -1,6 +1,5 @@
 # vim:fileencoding=utf-8:noet
-
-from __future__ import absolute_import, unicode_literals, division, print_function
+from __future__ import (unicode_literals, division, absolute_import, print_function)
 
 from powerline.renderer import Renderer
 from powerline.theme import Theme

powerline/renderers/shell/bash.py

@@ -1,6 +1,5 @@
 # vim:fileencoding=utf-8:noet
-
-from __future__ import absolute_import, unicode_literals
+from __future__ import (unicode_literals, division, absolute_import, print_function)
 
 from powerline.renderers.shell import ShellRenderer
 

powerline/renderers/shell/ksh.py

@@ -1,6 +1,5 @@
 # vim:fileencoding=utf-8:noet
-
-from __future__ import absolute_import, unicode_literals
+from __future__ import (unicode_literals, division, absolute_import, print_function)
 
 from powerline.renderers.shell import ShellRenderer
 

powerline/renderers/shell/tcsh.py

@@ -1,6 +1,5 @@
 # vim:fileencoding=utf-8:noet
-
-from __future__ import absolute_import, unicode_literals
+from __future__ import (unicode_literals, division, absolute_import, print_function)
 
 from powerline.renderers.shell.zsh import ZshPromptRenderer
 

powerline/renderers/shell/zsh.py

@@ -1,6 +1,5 @@
 # vim:fileencoding=utf-8:noet
-
-from __future__ import absolute_import, unicode_literals
+from __future__ import (unicode_literals, division, absolute_import, print_function)
 
 from powerline.renderers.shell import ShellRenderer
 

powerline/renderers/tmux.py

@@ -1,6 +1,5 @@
 # vim:fileencoding=utf-8:noet
-
-from __future__ import absolute_import, unicode_literals
+from __future__ import (unicode_literals, division, absolute_import, print_function)
 
 from powerline.renderer import Renderer
 from powerline.colorscheme import ATTR_BOLD, ATTR_ITALIC, ATTR_UNDERLINE

powerline/renderers/vim.py

@@ -1,20 +1,15 @@
 # vim:fileencoding=utf-8:noet
+from __future__ import (unicode_literals, division, absolute_import, print_function)
 
-from __future__ import absolute_import, unicode_literals
+import sys
+
+import vim
 
 from powerline.bindings.vim import vim_get_func, vim_getoption, environ, current_tabpage
 from powerline.renderer import Renderer
 from powerline.colorscheme import ATTR_BOLD, ATTR_ITALIC, ATTR_UNDERLINE
 from powerline.theme import Theme
-
-import vim
-import sys
-
-
-try:
-	from __builtin__ import unichr as chr
-except ImportError:
-	pass
+from powerline.lib.unicode import unichr
 
 
 vim_mode = vim_get_func('mode', rettype=str)
@@ -23,8 +18,8 @@ if int(vim.eval('v:version')) >= 702:
 	vim_mode = lambda: _vim_mode(1)
 
 mode_translations = {
-	chr(ord('V') - 0x40): '^V',
-	chr(ord('S') - 0x40): '^S',
+	unichr(ord('V') - 0x40): '^V',
+	unichr(ord('S') - 0x40): '^S',
 }
 
 
@@ -81,7 +76,7 @@ class VimRenderer(Renderer):
 				# renderer
 				return vim.strwidth(string.encode('utf-8'))
 		else:
-			@staticmethod  # NOQA
+			@staticmethod
 			def strwidth(string):
 				return vim.strwidth(string)
 

powerline/segment.py

@@ -1,5 +1,5 @@
 # vim:fileencoding=utf-8:noet
-from __future__ import absolute_import, unicode_literals, division, print_function
+from __future__ import (unicode_literals, division, absolute_import, print_function)
 
 from powerline.lib.watcher import create_file_watcher
 

powerline/segments/__init__.py

@@ -1,5 +1,5 @@
 # vim:fileencoding=utf-8:noet
-from __future__ import absolute_import
+from __future__ import (unicode_literals, division, absolute_import, print_function)
 
 import sys
 
@@ -26,7 +26,7 @@ class Segment(object):
 		def argspecobjs(self):
 			yield '__call__', self.__call__
 	else:
-		def argspecobjs(self):  # NOQA
+		def argspecobjs(self):
 			yield '__call__', self
 
 	argspecobjs.__doc__ = (

powerline/segments/common.py

@@ -1,6 +1,5 @@
 # vim:fileencoding=utf-8:noet
-
-from __future__ import unicode_literals, absolute_import, division
+from __future__ import (unicode_literals, division, absolute_import, print_function)
 
 import os
 import sys
@@ -9,6 +8,7 @@ import socket
 
 from datetime import datetime
 from multiprocessing import cpu_count as _cpu_count
+from collections import namedtuple
 
 from powerline.lib import add_divider_highlight_group
 from powerline.lib.shell import asrun, run_cmd
@@ -20,7 +20,6 @@ from powerline.lib.humanize_bytes import humanize_bytes
 from powerline.lib.unicode import u
 from powerline.theme import requires_segment_info, requires_filesystem_watcher
 from powerline.segments import Segment, with_docstring
-from collections import namedtuple
 
 
 cpu_count = None
@@ -676,23 +675,23 @@ try:
 				'highlight_group': ['cpu_load_percent_gradient', 'cpu_load_percent'],
 			}]
 except ImportError:
-	def _get_bytes(interface):  # NOQA
+	def _get_bytes(interface):
 		with open('/sys/class/net/{interface}/statistics/rx_bytes'.format(interface=interface), 'rb') as file_obj:
 			rx = int(file_obj.read())
 		with open('/sys/class/net/{interface}/statistics/tx_bytes'.format(interface=interface), 'rb') as file_obj:
 			tx = int(file_obj.read())
 		return (rx, tx)
 
-	def _get_interfaces():  # NOQA
+	def _get_interfaces():
 		for interface in os.listdir('/sys/class/net'):
 			x = _get_bytes(interface)
 			if x is not None:
 				yield interface, x[0], x[1]
 
-	def _get_user(segment_info):  # NOQA
+	def _get_user(segment_info):
 		return segment_info['environ'].get('USER', None)
 
-	class CPULoadPercentSegment(ThreadedSegment):  # NOQA
+	class CPULoadPercentSegment(ThreadedSegment):
 		interval = 1
 
 		@staticmethod
@@ -764,12 +763,12 @@ if os.path.exists('/proc/uptime'):
 elif 'psutil' in globals():
 	from time import time
 
-	def _get_uptime():  # NOQA
+	def _get_uptime():
 		# psutil.BOOT_TIME is not subject to clock adjustments, but time() is.
 		# Thus it is a fallback to /proc/uptime reading and not the reverse.
 		return int(time() - psutil.BOOT_TIME)
 else:
-	def _get_uptime():  # NOQA
+	def _get_uptime():
 		raise NotImplementedError
 
 
@@ -1199,14 +1198,14 @@ class NowPlayingSegment(Segment):
 		}
 
 	try:
-		__import__('dbus')  # NOQA
+		__import__('dbus')
 	except ImportError:
 		if sys.platform.startswith('darwin'):
 			player_spotify = player_spotify_apple_script
 		else:
-			player_spotify = player_spotify_dbus  # NOQA
+			player_spotify = player_spotify_dbus
 	else:
-		player_spotify = player_spotify_dbus  # NOQA
+		player_spotify = player_spotify_dbus
 
 	def player_rhythmbox(self, pl):
 		now_playing = run_cmd(pl, ['rhythmbox-client', '--no-start', '--no-present', '--print-playing-format', '%at\n%aa\n%tt\n%te\n%td'])

powerline/segments/i3wm.py

@@ -1,4 +1,5 @@
 # vim:fileencoding=utf-8:noet
+from __future__ import (unicode_literals, division, absolute_import, print_function)
 
 import i3
 

powerline/segments/ipython.py

@@ -1,4 +1,5 @@
 # vim:fileencoding=utf-8:noet
+from __future__ import (unicode_literals, division, absolute_import, print_function)
 
 from powerline.theme import requires_segment_info
 

powerline/segments/shell.py

@@ -1,4 +1,5 @@
 # vim:fileencoding=utf-8:noet
+from __future__ import (unicode_literals, division, absolute_import, print_function)
 
 from powerline.theme import requires_segment_info
 from powerline.segments import with_docstring

powerline/segments/tmux.py

@@ -1,5 +1,5 @@
 # vim:fileencoding=utf-8:noet
-from __future__ import absolute_import, unicode_literals, division, print_function
+from __future__ import (unicode_literals, division, absolute_import, print_function)
 
 from powerline.bindings.tmux import get_tmux_output
 

powerline/segments/vim/__init__.py

@@ -1,16 +1,15 @@
 # vim:fileencoding=utf-8:noet
-
-from __future__ import unicode_literals, absolute_import, division
+from __future__ import (unicode_literals, division, absolute_import, print_function)
 
 import os
 import re
 
+from collections import defaultdict
+
 try:
 	import vim
 except ImportError:
-	vim = {}  # NOQA
-
-from collections import defaultdict
+	vim = {}
 
 from powerline.bindings.vim import (vim_get_func, getbufvar, vim_getbufoption,
                                     buffer_name, vim_getwinvar,

powerline/segments/vim/plugin/__init__.py

@@ -1,2 +1,6 @@
+# vim:fileencoding=utf-8:noet
+from __future__ import (unicode_literals, division, absolute_import, print_function)
 from pkgutil import extend_path
+
+
 __path__ = extend_path(__path__, __name__)

powerline/segments/vim/plugin/ctrlp.py

@@ -1,9 +1,10 @@
 # vim:fileencoding=utf-8:noet
+from __future__ import (unicode_literals, division, absolute_import, print_function)
 
 try:
 	import vim
 except ImportError:
-	vim = object()  # NOQA
+	vim = object()
 
 from powerline.bindings.vim import getbufvar
 from powerline.segments.vim import window_cached
@@ -33,7 +34,7 @@ def ctrlp_stl_left_main(pl, focus, byfname, regex, prev, item, next, marked):
 		segments.append({
 			'contents': 'regex',
 			'highlight_group': ['ctrlp.regex', 'background'],
-			})
+		})
 
 	segments += [
 		{
@@ -62,7 +63,7 @@ def ctrlp_stl_left_main(pl, focus, byfname, regex, prev, item, next, marked):
 			'contents': marked,
 			'highlight_group': ['ctrlp.marked', 'background'],
 			'draw_inner_divider': True,
-			})
+		})
 
 	return segments
 

powerline/segments/vim/plugin/nerdtree.py

@@ -1,9 +1,10 @@
 # vim:fileencoding=utf-8:noet
+from __future__ import (unicode_literals, division, absolute_import, print_function)
 
 try:
 	import vim
 except ImportError:
-	vim = object()  # NOQA
+	vim = object()
 
 from powerline.bindings.vim import bufvar_exists
 from powerline.segments.vim import window_cached

powerline/segments/vim/plugin/syntastic.py

@@ -1,9 +1,10 @@
 # vim:fileencoding=utf-8:noet
+from __future__ import (unicode_literals, division, absolute_import, print_function)
 
 try:
 	import vim
 except ImportError:
-	vim = object()  # NOQA
+	vim = object()
 
 from powerline.segments.vim import window_cached
 

powerline/segments/vim/plugin/tagbar.py

@@ -1,9 +1,10 @@
 # vim:fileencoding=utf-8:noet
+from __future__ import (unicode_literals, division, absolute_import, print_function)
 
 try:
 	import vim
 except ImportError:
-	vim = object()  # NOQA
+	vim = object()
 
 from powerline.segments.vim import window_cached
 

powerline/shell.py

@@ -1,4 +1,6 @@
 # vim:fileencoding=utf-8:noet
+# WARNING: using unicode_literals causes errors in argparse
+from __future__ import (division, absolute_import, print_function)
 
 from powerline import Powerline
 from powerline.lib import mergedicts, parsedotval

powerline/theme.py

@@ -1,9 +1,10 @@
 # vim:fileencoding=utf-8:noet
-from __future__ import division
+from __future__ import (unicode_literals, division, absolute_import, print_function)
+
+import itertools
 
 from powerline.segment import gen_segment_getter, process_segment
 from powerline.lib.unicode import u
-import itertools
 
 
 def requires_segment_info(func):

powerline/vim.py

@@ -1,6 +1,5 @@
 # vim:fileencoding=utf-8:noet
-
-from __future__ import absolute_import
+from __future__ import (unicode_literals, division, absolute_import, print_function)
 
 import sys
 
@@ -215,7 +214,7 @@ class VimPowerline(Powerline):
 		_vim_getwinvar = staticmethod(vim_get_func('getwinvar'))
 		_vim_setwinvar = staticmethod(vim_get_func('setwinvar'))
 
-		def win_idx(self, window_id):  # NOQA
+		def win_idx(self, window_id):
 			r = None
 			for winnr, window in zip(count(1), vim.windows):
 				curwindow_id = self._vim_getwinvar(winnr, 'powerline_window_id')

scripts/powerline-config

@@ -1,7 +1,10 @@
 #!/usr/bin/env python
 # vim:fileencoding=utf-8:noet
+
 '''Script used to obtain powerline configuration'''
 
+from __future__ import (unicode_literals, division, absolute_import, print_function)
+
 import argparse
 
 try:
@@ -10,7 +13,7 @@ except ImportError:
 	import sys
 	import os
 	sys.path.append(os.path.dirname(os.path.dirname(os.path.abspath(os.path.realpath(__file__)))))
-	import powerline.bindings.config as config  # NOQA
+	import powerline.bindings.config as config
 
 
 TMUX_ACTIONS = {

scripts/powerline-daemon

@@ -6,6 +6,7 @@ import socket
 import os
 import errno
 import sys
+
 from argparse import ArgumentParser
 from select import select
 from signal import signal, SIGTERM
@@ -246,7 +247,7 @@ def daemonize(stdin=os.devnull, stdout=os.devnull, stderr=os.devnull):
 			# exit first parent
 			sys.exit(0)
 	except OSError as e:
-		print ("fork #1 failed: %d (%s)" % (e.errno, e.strerror), file=sys.stderr)
+		sys.stderr.write("fork #1 failed: %d (%s)\n" % (e.errno, e.strerror))
 		sys.exit(1)
 
 	# decouple from parent environment
@@ -261,7 +262,7 @@ def daemonize(stdin=os.devnull, stdout=os.devnull, stderr=os.devnull):
 			# exit from second parent
 			sys.exit(0)
 	except OSError as e:
-		print ("fork #2 failed: %d (%s)" % (e.errno, e.strerror), file=sys.stderr)
+		sys.stderr.write("fork #2 failed: %d (%s)\n" % (e.errno, e.strerror))
 		sys.exit(1)
 
 	# Redirect standard file descriptors.
@@ -399,16 +400,18 @@ def main():
 		# Create a locked pid file containing the daemon's PID
 		if lockpidfile() is None:
 			if not args.quiet:
-				print ('The daemon is already running. Use %s -k to kill it.' % os.path.basename(sys.argv[0]),
-						file=sys.stderr)
+				sys.stderr.write(
+					'The daemon is already running. Use %s -k to kill it.\n' % (
+						os.path.basename(sys.argv[0])))
 			raise SystemExit(1)
 
 	# Bind to address or bail if we cannot bind
 	sock = check_existing()
 	if sock is None:
 		if not args.quiet:
-			print ('The daemon is already running. Use %s -k to kill it.' % os.path.basename(sys.argv[0]),
-					file=sys.stderr)
+			sys.stderr.write(
+				'The daemon is already running. Use %s -k to kill it.\n' % (
+					os.path.basename(sys.argv[0])))
 		raise SystemExit(1)
 
 	if args.foreground:

scripts/powerline-lint

@@ -1,10 +1,15 @@
 #!/usr/bin/env python
 # vim:fileencoding=utf-8:noet
+
 '''Powerline configuration checker.'''
+
+from __future__ import (unicode_literals, division, absolute_import, print_function)
+
 import argparse
-from powerline.lint import check
 import sys
 
+from powerline.lint import check
+
 
 parser = argparse.ArgumentParser(description=__doc__)
 parser.add_argument('-p', '--config_path', action='append', metavar='PATH')

scripts/powerline-render

@@ -1,6 +1,10 @@
 #!/usr/bin/env python
 # vim:fileencoding=utf-8:noet
+
 '''Powerline prompt and statusline script.'''
+
+from __future__ import (unicode_literals, division, absolute_import, print_function)
+
 import sys
 import os
 
@@ -10,7 +14,7 @@ try:
 	from powerline.shell import ShellPowerline, get_argparser, finish_args, write_output
 except ImportError:
 	sys.path.append(os.path.dirname(os.path.dirname(os.path.abspath(os.path.realpath(__file__)))))
-	from powerline.shell import ShellPowerline, get_argparser, finish_args, write_output  # NOQA
+	from powerline.shell import ShellPowerline, get_argparser, finish_args, write_output
 
 
 if sys.version_info < (3,):

setup.py

@@ -1,6 +1,7 @@
 #!/usr/bin/env python
 # vim:fileencoding=utf-8:noet
-from __future__ import unicode_literals
+from __future__ import (unicode_literals, division, absolute_import, print_function)
+
 import os
 import sys
 import subprocess
@@ -8,6 +9,7 @@ import logging
 
 from setuptools import setup, find_packages
 
+
 CURRENT_DIR = os.path.abspath(os.path.dirname(__file__))
 try:
 	README = open(os.path.join(CURRENT_DIR, 'README.rst'), 'rb').read().decode('utf-8')

tests/__init__.py

@@ -1,5 +1,8 @@
 # vim:fileencoding=utf-8:noet
+from __future__ import (unicode_literals, division, absolute_import, print_function)
+
 import sys
+
 if sys.version_info < (2, 7):
 	from unittest2 import TestCase, main  # NOQA
 	from unittest2.case import SkipTest  # NOQA

tests/lib/__init__.py

@@ -1,4 +1,6 @@
 # vim:fileencoding=utf-8:noet
+from __future__ import (unicode_literals, division, absolute_import, print_function)
+
 import imp
 import sys
 

tests/lib/config_mock.py

@@ -1,13 +1,18 @@
 # vim:fileencoding=utf-8:noet
+from __future__ import (unicode_literals, division, absolute_import, print_function)
+
+import os
+
 from threading import Lock
-from powerline.renderer import Renderer
-from powerline.lib.config import ConfigLoader
-from powerline import Powerline
-from tests.lib import Args, replace_attr
 from copy import deepcopy
 from time import sleep
 from functools import wraps
-import os
+
+from powerline.renderer import Renderer
+from powerline.lib.config import ConfigLoader
+from powerline import Powerline
+
+from tests.lib import Args, replace_attr
 
 
 class TestHelpers(object):

tests/lib/fsconfig.py

@@ -1,5 +1,5 @@
 # vim:fileencoding=utf-8:noet
-from __future__ import unicode_literals, absolute_import, division
+from __future__ import (unicode_literals, division, absolute_import, print_function)
 
 import os
 import json

tests/matchers.py

@@ -1,5 +1,4 @@
 # vim:fileencoding=utf-8:noet
-
 from __future__ import (unicode_literals, division, absolute_import, print_function)
 
 

tests/path/vim.py

@@ -1,4 +1,6 @@
 # vim:fileencoding=utf-8:noet
+from __future__ import (unicode_literals, division, absolute_import, print_function)
+
 from tests import vim
 
 

tests/test_cmdline.py

@@ -2,15 +2,19 @@
 
 '''Tests for shell.py parser'''
 
+from __future__ import (unicode_literals, division, absolute_import, print_function)
 
-from powerline.shell import get_argparser, finish_args
-from tests import TestCase
-from tests.lib import replace_attr
 import sys
+
 if sys.version_info < (3,):
 	from io import BytesIO as StrIO
 else:
-	from io import StringIO as StrIO  # NOQA
+	from io import StringIO as StrIO
+
+from powerline.shell import get_argparser, finish_args
+
+from tests import TestCase
+from tests.lib import replace_attr
 
 
 class TestParser(TestCase):