Add Python 3.3 support

Support for unicode literals was reintroduced in Python 3.3 which makes
supporting both Python 2 and Python 3 much easier, so this will be the
minimum supported Python 3 version.

Closes #8.

docs/source/overview.rst

@@ -4,7 +4,7 @@ Overview
 Requirements
 ------------
 
-Powerline requires Python 2.7 to work.
+Powerline requires Python 3.3 or Python 2.7 to work.
 
 Powerline uses several special glyphs to get the arrow effect and some 
 custom symbols for developers. This requires that you either have the symbol 
@@ -14,13 +14,14 @@ details.
 Vim plugin requirements
 ^^^^^^^^^^^^^^^^^^^^^^^
 
-The vim plugin requires a vim version with Python 2.7 support compiled in.  
+The vim plugin requires a vim version with Python support compiled in.  You 
-You can check if your vim supports Python 2 by running ``vim --version 
+can check if your vim supports Python by running ``vim --version | grep 
-| grep +python``.
++python``.
 
-If your vim version doesn't have support for Python 2, you'll have to 
+If your vim version doesn't have support for Python, you'll have to compile 
-compile it with the ``--enable-pythoninterp`` flag (this also requires the 
+it with the ``--enable-python3interp`` flag (``--enable-pythoninterp`` if 
-Python headers to be installed on your system). Please consult your 
+you want Python 2 support instead). Note that this also requires the related 
+Python headers to be installed on your system. Please consult your 
 distribution's documentation for details on how to compile and install 
 packages.
 
@@ -48,9 +49,6 @@ To install Powerline system-wide, run the following command as root::
 If you don't have root access or don't want to install Powerline 
 system-wide, install with ``pip install --user`` instead.
 
-.. note:: Make sure that you install the package for Python 2. For distros 
-   like Arch Linux you'll have to run ``pip2`` instead of ``pip``.
-
 .. note:: This project is currently unavailable on the PyPI due to a naming 
    conflict with an unrelated project.
 

powerline/bindings/vim/plugin/source_plugin.vim

@@ -1,11 +1,13 @@
-if ! has('python')
+if ! has('python') && ! has('python3')
 	echohl ErrorMsg
-	echomsg 'You need vim compiled with Python 2 support for Powerline to work. Please consult the documentation for more details.'
+	echomsg 'You need vim compiled with Python 3.3 or Python 2.7 support for Powerline to work. Please consult the documentation for more details.'
 	echohl None
 	finish
 endif
 
-python import sys, vim
+let s:pycmd = has('python3') ? 'python3' : 'python'
-python sys.path.append(vim.eval('expand("<sfile>:h:h:h:h:h")'))
+
+exec s:pycmd ' import sys, vim'
+exec s:pycmd ' sys.path.append(vim.eval(''expand("<sfile>:h:h:h:h:h")''))'
 
 source <sfile>:h:h/powerline.vim

powerline/bindings/vim/powerline.vim

@@ -1,13 +1,17 @@
-python import uuid
+let s:pycmd = has('python3') ? 'python3' : 'python'
-python from powerline.core import Powerline
-python powerline = Powerline('vim')
 
-if exists('*pyeval')
+exec s:pycmd ' import uuid'
+exec s:pycmd ' from powerline.core import Powerline'
+exec s:pycmd ' powerline = Powerline("vim")'
+
+if exists('*py3eval')
+	let s:pyeval = function('py3eval')
+elseif exists('*pyeval')
 	let s:pyeval = function('pyeval')
 else
-	python import json, vim
+	exec s:pycmd ' import json, vim'
 	function! s:pyeval(e)
-		python vim.command('return ' + json.dumps(eval(vim.eval('a:e'))))
+		exec s:pycmd ' vim.command("return " + json.dumps(eval(vim.eval("a:e"))))'
 	endfunction
 endif
 

powerline/core.py

@@ -5,8 +5,8 @@ import json
 import os
 import sys
 
-from colorscheme import Colorscheme
+from powerline.colorscheme import Colorscheme
-from matcher import Matcher
+from powerline.matcher import Matcher
 from powerline.lib import underscore_to_camelcase
 
 
@@ -37,7 +37,7 @@ class Powerline(object):
 			'common_config': self.config,
 			}
 		local_themes = {}
-		for key, local_theme_name in self.config_ext.get('local_themes', {}).iteritems():
+		for key, local_theme_name in self.config_ext.get('local_themes', {}).items():
 			key = self.get_matcher(key)
 			local_themes[key] = {'config': self._load_theme_config(ext, local_theme_name)}
 
@@ -74,6 +74,6 @@ class Powerline(object):
 		for path in self.search_paths:
 			config_file_path = os.path.join(path, config_file)
 			if os.path.isfile(config_file_path):
-				with open(config_file_path, 'rb') as config_file_fp:
+				with open(config_file_path, 'r') as config_file_fp:
 					return json.load(config_file_fp)
 		raise IOError('Config file not found in search path: {0}'.format(config_file))

powerline/lib/__init__.py

@@ -1,5 +1,5 @@
-from memoize import memoize  # NOQA
+from powerline.lib.memoize import memoize  # NOQA
-from humanize_bytes import humanize_bytes  # NOQA
+from powerline.lib.humanize_bytes import humanize_bytes  # NOQA
 
 
 def underscore_to_camelcase(string):

powerline/lib/humanize_bytes.py

@@ -1,7 +1,7 @@
 # -*- coding: utf-8 -*-
 
 from math import log
-unit_list = zip(['', 'k', 'M', 'G', 'T', 'P'], [0, 0, 1, 2, 2, 2])
+unit_list = tuple(zip(['', 'k', 'M', 'G', 'T', 'P'], [0, 0, 1, 2, 2, 2]))
 
 
 def humanize_bytes(num, suffix='B', binary_prefix=False):

powerline/lib/memoize.py

@@ -1,6 +1,9 @@
 # -*- coding: utf-8 -*-
 
-import cPickle as pickle
+try:
+	import cPickle as pickle
+except ImportError:
+	import pickle
 import functools
 import os
 import tempfile

powerline/lib/vcs/git.py

@@ -93,7 +93,7 @@ except ImportError:
 		p = Popen(cmd, shell=False, stdout=PIPE, stderr=PIPE, cwd=cwd)
 		p.stderr.close()
 		for line in p.stdout:
-			yield line[:-1]
+			yield line[:-1].decode('utf-8')
 
 	class Repository(object):
 		__slots__ = ('directory',)
@@ -107,10 +107,10 @@ except ImportError:
 		def status(self, path=None):
 			if path:
 				try:
-					return self._gitcmd('status', '--porcelain', '--', path).next()[:2]
+					return next(self._gitcmd('status', '--porcelain', '--', path))[:2]
 				except StopIteration:
 					try:
-						self._gitcmd('ls-files', '--ignored', '--exclude-standard', '--others', '--', path).next()
+						next(self._gitcmd('ls-files', '--ignored', '--exclude-standard', '--others', '--', path))
 						return '!!'
 					except StopIteration:
 						return None

powerline/renderer.py

@@ -1,7 +1,7 @@
 # -*- coding: utf-8 -*-
 
-from colorscheme import Colorscheme
+from powerline.colorscheme import Colorscheme
-from theme import Theme
+from powerline.theme import Theme
 
 
 class Renderer(object):
@@ -20,7 +20,7 @@ class Renderer(object):
 		self.local_themes[matcher] = theme
 
 	def get_theme(self):
-		for matcher in self.local_themes.iterkeys():
+		for matcher in self.local_themes.keys():
 			if matcher():
 				match = self.local_themes[matcher]
 				if 'config' in match:

powerline/segments/common.py

@@ -18,6 +18,31 @@ weather_conditions_codes = {
 }
 
 
+def _urllib_read(url):
+	try:
+		import urllib.error
+		import urllib.request
+		try:
+			return urllib.request.urlopen(url).read().decode('utf-8')
+		except urllib.error.HTTPError:
+			return
+	except ImportError:
+		import urllib2
+		try:
+			return urllib2.urlopen(url).read()
+		except urllib2.HTTPError:
+			return
+
+
+def _urllib_urlencode(string):
+	try:
+		import urllib.parse
+		return urllib.parse.urlencode(string)
+	except ImportError:
+		import urllib
+		return urllib.urlencode(string)
+
+
 def hostname():
 	import socket
 	if not os.environ.get('SSH_CLIENT'):
@@ -44,7 +69,10 @@ def branch():
 
 def cwd(dir_shorten_len=None, dir_limit_depth=None):
 	import re
-	cwd = os.getcwdu()
+	try:
+		cwd = os.getcwdu()
+	except AttributeError:
+		cwd = os.getcwd()
 	home = os.environ.get('HOME')
 	if home:
 		cwd = re.sub('^' + re.escape(home), '~', cwd, 1)
@@ -65,11 +93,7 @@ def date(format='%Y-%m-%d'):
 
 @memoize(600, persistent=True)
 def external_ip(query_url='http://ipv4.icanhazip.com/'):
-	import urllib2
+	return _urllib_read(query_url).strip()
-	try:
-		return urllib2.urlopen(query_url).read().strip()
-	except urllib2.HTTPError:
-		return
 
 
 def uptime(format='{days:02d}d {hours:02d}h {minutes:02d}m'):
@@ -92,12 +116,10 @@ def uptime(format='{days:02d}d {hours:02d}h {minutes:02d}m'):
 @memoize(1800, persistent=True)
 def weather(unit='c', location_query=None):
 	import json
-	import urllib
-	import urllib2
 
 	if not location_query:
 		try:
-			location = json.loads(urllib2.urlopen('http://freegeoip.net/json/' + external_ip()).read())
+			location = json.loads(_urllib_read('http://freegeoip.net/json/' + external_ip()))
 			location_query = ','.join([location['city'], location['region_name'], location['country_name']])
 		except ValueError:
 			return None
@@ -107,8 +129,8 @@ def weather(unit='c', location_query=None):
 			'select * from we where location="{0}" and unit="{1}"'.format(location_query, unit),
 		'format': 'json'
 	}
-	url = 'http://query.yahooapis.com/v1/public/yql?' + urllib.urlencode(query_data)
+	url = 'http://query.yahooapis.com/v1/public/yql?' + _urllib_urlencode(query_data)
-	response = json.loads(urllib2.urlopen(url).read())
+	response = json.loads(_urllib_read(url))
 	condition = response['query']['results']['weather']['rss']['channel']['item']['condition']
 	condition_code = int(condition['code'])
 	icon = u'〇'

powerline/segments/vim.py

@@ -39,8 +39,8 @@ vim_modes = {
 }
 
 mode_translations = {
-	chr(ord('V')-0x40): '^V',
+	chr(ord('V') - 0x40): '^V',
-	chr(ord('S')-0x40): '^S',
+	chr(ord('S') - 0x40): '^S',
 }
 
 
@@ -53,7 +53,7 @@ def mode(override=None):
 
 		mode = mode({ 'n': 'NORM' })
 	'''
-	mode = vim_funcs['mode']()
+	mode = vim_funcs['mode']().decode('utf-8')
 	mode = mode_translations.get(mode, mode)
 	if not override:
 		return vim_modes[mode]
@@ -80,7 +80,7 @@ def readonly_indicator(text=u''):
 
 def file_directory():
 	'''Return file directory (head component of the file path).'''
-	file_directory = vim_funcs['expand']('%:~:.:h')
+	file_directory = vim_funcs['expand']('%:~:.:h').decode('utf-8')
 	return file_directory + os.sep if file_directory else None
 
 

powerline/theme.py

@@ -1,9 +1,9 @@
 # -*- coding: utf-8 -*-
 
+from collections import defaultdict
 import copy
 
-from collections import defaultdict
+from .segment import Segment
-from segment import Segment
 
 class Theme(object):
 	def __init__(self, ext, colorscheme, theme_config, common_config):
@@ -42,7 +42,11 @@ class Theme(object):
 				pass
 			else:
 				continue
-			segment['contents'] = unicode(segment['before'] + unicode(segment['contents']) + segment['after'])\
+			try:
+				contents = unicode(segment['contents'])
+			except NameError:
+				contents = str(segment['contents'])
+			segment['contents'] = (segment['before'] + contents + segment['after'])\
 				.ljust(segment['ljust'])\
 				.rjust(segment['rjust'])
 			# We need to yield a copy of the segment, or else mode-dependent

scripts/powerline-prompt

@@ -1,4 +1,4 @@
-#!/usr/bin/env python2
+#!/usr/bin/env python
 # -*- coding: utf-8 -*-
 '''Powerline prompt script.'''
 import argparse
@@ -22,4 +22,4 @@ if __name__ == '__main__':
 	segments = pl.renderer.get_theme().get_segments()
 	if args.side != 'all':
 		segments = [s for s in segments if s['side'] == args.side]
-	print(pl.renderer.render(None, segments=segments).encode('utf-8'))
+	print(pl.renderer.render(None, segments=segments))

scripts/powerline-tmux

@@ -1,4 +1,4 @@
-#!/usr/bin/env python2
+#!/usr/bin/env python
 # -*- coding: utf-8 -*-
 '''Powerline tmux statusline.'''
 import argparse
@@ -9,7 +9,7 @@ except ImportError:
 	import os
 	import sys
 	sys.path.append(os.path.dirname(os.path.dirname(os.path.abspath(__file__))))
-	from powerline.core import Powerline
+	from powerline.core import Powerline  # NOQA
 
 parser = argparse.ArgumentParser(description=__doc__)
 parser.add_argument('side', nargs='?', default='all', choices=('all', 'left', 'right'))
@@ -21,4 +21,4 @@ if __name__ == '__main__':
 	segments = pl.renderer.get_theme().get_segments()
 	if args.side != 'all':
 		segments = [s for s in segments if s['side'] == args.side]
-	print(pl.renderer.render('n', segments=segments).encode('utf-8'))
+	print(pl.renderer.render(None, segments=segments))

setup.py

@@ -1,4 +1,4 @@
-#!/usr/bin/env python2
+#!/usr/bin/env python
 # -*- coding: utf-8 -*-
 
 import os