diff --git a/BaseTools/Scripts/PackageDocumentTools/Readme.md b/BaseTools/Scripts/PackageDocumentTools/Readme.md
index dfc2892c41..f8f81e35ab 100644
--- a/BaseTools/Scripts/PackageDocumentTools/Readme.md
+++ b/BaseTools/Scripts/PackageDocumentTools/Readme.md
@@ -1,6 +1,6 @@
 Prerequisite Tools:
-1. Install Python 2.7.3 from https://www.python.org/download/releases/2.7.3/
-2. Install wxPython 2.8.12.1 from https://sourceforge.net/projects/wxpython/files/wxPython/2.8.12.1/
+1. Install Python 3.6.6 from https://www.python.org/downloads/release/python-366/
+2. Install wxPython 4.0.3 from https://pypi.org/project/wxPython/#files
    generally the libraries will be installed at python's subfolder, for example in windows: c:\python27\Lib\site-packages\
 3. Install DoxyGen 1.8.6 from https://sourceforge.net/projects/doxygen/files/rel-1.8.6/
 4. (Windows only) Install Htmlhelp tool from https://msdn.microsoft.com/en-us/library/windows/desktop/ms669985(v=vs.85).aspx
diff --git a/BaseTools/Scripts/PackageDocumentTools/packagedoc_cli.py b/BaseTools/Scripts/PackageDocumentTools/packagedoc_cli.py
index 4deeee01a5..94c004902f 100644
--- a/BaseTools/Scripts/PackageDocumentTools/packagedoc_cli.py
+++ b/BaseTools/Scripts/PackageDocumentTools/packagedoc_cli.py
@@ -12,12 +12,11 @@
 # WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
 #
 
-from __future__ import print_function
 import os, sys, logging, traceback, subprocess
 from optparse import OptionParser
 
-import plugins.EdkPlugins.edk2.model.baseobject as baseobject
-import plugins.EdkPlugins.edk2.model.doxygengen as doxygengen
+from .plugins.EdkPlugins.edk2.model import baseobject
+from .plugins.EdkPlugins.edk2.model import doxygengen
 
 gArchMarcoDict = {'ALL'      : 'MDE_CPU_IA32 MDE_CPU_X64 MDE_CPU_EBC MDE_CPU_IPF _MSC_EXTENSIONS __GNUC__ __INTEL_COMPILER',
                   'IA32_MSFT': 'MDE_CPU_IA32 _MSC_EXTENSIONS',
@@ -38,7 +37,7 @@ def parseCmdArgs():
                       help='Specify the absolute path of doxygen tools installation. For example: C:\\Program Files\\doxygen\bin\doxygen.exe')
     parser.add_option('-o', '--output', action='store', dest='OutputPath',
                       help='Specify the document output path. For example: c:\\docoutput')
-    parser.add_option('-a', '--arch', action='store', dest='Arch', choices=gArchMarcoDict.keys(),
+    parser.add_option('-a', '--arch', action='store', dest='Arch', choices=list(gArchMarcoDict.keys()),
                       help='Specify the architecture used in preprocess package\'s source. For example: -a IA32_MSFT')
     parser.add_option('-m', '--mode', action='store', dest='DocumentMode', choices=['CHM', 'HTML'],
                       help='Specify the document mode from : CHM or HTML')
diff --git a/BaseTools/Scripts/PackageDocumentTools/packagedocapp.pyw b/BaseTools/Scripts/PackageDocumentTools/packagedocapp.pyw
index 28f6f9bf5c..f81ecfdc4c 100644
--- a/BaseTools/Scripts/PackageDocumentTools/packagedocapp.pyw
+++ b/BaseTools/Scripts/PackageDocumentTools/packagedocapp.pyw
@@ -18,8 +18,8 @@ import os, sys, wx, logging
 import wx.stc
 import wx.lib.newevent
 import wx.lib.agw.genericmessagedialog as GMD
-import plugins.EdkPlugins.edk2.model.baseobject as baseobject
-import plugins.EdkPlugins.edk2.model.doxygengen as doxygengen
+from plugins.EdkPlugins.edk2.model import baseobject
+from plugins.EdkPlugins.edk2.model import doxygengen
 
 if hasattr(sys, "frozen"):
     appPath = os.path.abspath(os.path.dirname(sys.executable))
@@ -42,7 +42,7 @@ class PackageDocApp(wx.App):
 
         frame.Show(True)
 
-        EVT_APP_CALLBACK( self, self.OnAppCallBack)
+        self.Bind(EVT_APP_CALLBACK, self.OnAppCallBack)
         return True
 
     def GetLogger(self):
@@ -60,13 +60,13 @@ class PackageDocApp(wx.App):
 
 class PackageDocMainFrame(wx.Frame):
     def __init__(self, parent, title):
-        wx.Frame.__init__(self, parent, -1, title, size=(550, 290), style=wx.MINIMIZE_BOX|wx.SYSTEM_MENU|wx.CAPTION|wx.CLOSE_BOX )
+        wx.Frame.__init__(self, parent, -1, title, size=(550, 350), style=wx.MINIMIZE_BOX|wx.SYSTEM_MENU|wx.CAPTION|wx.CLOSE_BOX )
 
         panel = wx.Panel(self)
         sizer = wx.BoxSizer(wx.VERTICAL)
 
         subsizer = wx.GridBagSizer(5, 10)
-        subsizer.AddGrowableCol(1)
+        subsizer.AddGrowableCol(0)
         subsizer.Add(wx.StaticText(panel, -1, "Workspace Location : "), (0, 0), flag=wx.ALIGN_CENTER_VERTICAL)
         self._workspacePathCtrl = wx.ComboBox(panel, -1)
         list = self.GetConfigure("WorkspacePath")
@@ -76,9 +76,9 @@ class PackageDocMainFrame(wx.Frame):
             self._workspacePathCtrl.SetValue(list[len(list) - 1])
 
         subsizer.Add(self._workspacePathCtrl, (0, 1), flag=wx.ALIGN_CENTER_VERTICAL|wx.EXPAND)
-        self._workspacePathBt = wx.BitmapButton(panel, -1, bitmap=wx.ArtProvider_GetBitmap(wx.ART_FILE_OPEN))
+        self._workspacePathBt = wx.BitmapButton(panel, -1, bitmap=wx.ArtProvider.GetBitmap(wx.ART_FILE_OPEN))
         subsizer.Add(self._workspacePathBt, (0, 2), flag=wx.ALIGN_CENTER_VERTICAL)
-        wx.EVT_BUTTON(self._workspacePathBt, self._workspacePathBt.GetId(), self.OnBrowsePath)
+        self.Bind(wx.EVT_BUTTON, self.OnBrowsePath, self._workspacePathBt)
 
         subsizer.Add(wx.StaticText(panel, -1, "Package DEC Location : "), (1, 0), flag=wx.ALIGN_CENTER_VERTICAL|wx.EXPAND)
         self._packagePathCtrl = wx.ComboBox(panel, -1)
@@ -88,9 +88,9 @@ class PackageDocMainFrame(wx.Frame):
                 self._packagePathCtrl.Append(item)
             self._packagePathCtrl.SetValue(list[len(list) - 1])
         subsizer.Add(self._packagePathCtrl, (1, 1), flag=wx.ALIGN_CENTER_VERTICAL|wx.EXPAND)
-        self._packagePathBt = wx.BitmapButton(panel, -1, bitmap=wx.ArtProvider_GetBitmap(wx.ART_FILE_OPEN))
+        self._packagePathBt = wx.BitmapButton(panel, -1, bitmap=wx.ArtProvider.GetBitmap(wx.ART_FILE_OPEN))
         subsizer.Add(self._packagePathBt, (1, 2), flag=wx.ALIGN_CENTER_VERTICAL)
-        wx.EVT_BUTTON(self._packagePathBt, self._packagePathBt.GetId(), self.OnBrowsePath)
+        self.Bind(wx.EVT_BUTTON, self.OnBrowsePath, self._packagePathBt)
 
         subsizer.Add(wx.StaticText(panel, -1, "Doxygen Tool Location : "), (2, 0), flag=wx.ALIGN_CENTER_VERTICAL)
         self._doxygenPathCtrl = wx.TextCtrl(panel, -1)
@@ -103,10 +103,10 @@ class PackageDocMainFrame(wx.Frame):
             else:
                 self._doxygenPathCtrl.SetValue('/usr/bin/doxygen')
 
-        self._doxygenPathBt = wx.BitmapButton(panel, -1, bitmap=wx.ArtProvider_GetBitmap(wx.ART_FILE_OPEN))
+        self._doxygenPathBt = wx.BitmapButton(panel, -1, bitmap=wx.ArtProvider.GetBitmap(wx.ART_FILE_OPEN))
         subsizer.Add(self._doxygenPathCtrl, (2, 1), flag=wx.ALIGN_CENTER_VERTICAL|wx.EXPAND)
         subsizer.Add(self._doxygenPathBt, (2, 2), flag=wx.ALIGN_CENTER_VERTICAL)
-        wx.EVT_BUTTON(self._doxygenPathBt, self._doxygenPathBt.GetId(), self.OnBrowsePath)
+        self.Bind(wx.EVT_BUTTON, self.OnBrowsePath, self._doxygenPathBt)
 
         subsizer.Add(wx.StaticText(panel, -1, "CHM Tool Location : "), (3, 0), flag=wx.ALIGN_CENTER_VERTICAL)
         self._chmPathCtrl = wx.TextCtrl(panel, -1)
@@ -116,10 +116,10 @@ class PackageDocMainFrame(wx.Frame):
         else:
             self._chmPathCtrl.SetValue('C:\\Program Files\\HTML Help Workshop\\hhc.exe')
 
-        self._chmPathBt = wx.BitmapButton(panel, -1, bitmap=wx.ArtProvider_GetBitmap(wx.ART_FILE_OPEN))
+        self._chmPathBt = wx.BitmapButton(panel, -1, bitmap=wx.ArtProvider.GetBitmap(wx.ART_FILE_OPEN))
         subsizer.Add(self._chmPathCtrl, (3, 1), flag=wx.ALIGN_CENTER_VERTICAL|wx.EXPAND)
         subsizer.Add(self._chmPathBt, (3, 2), flag=wx.ALIGN_CENTER_VERTICAL)
-        wx.EVT_BUTTON(self._chmPathBt, self._chmPathBt.GetId(), self.OnBrowsePath)
+        self.Bind(wx.EVT_BUTTON, self.OnBrowsePath, self._chmPathBt)
 
         subsizer.Add(wx.StaticText(panel, -1, "Output Location : "), (4, 0), flag=wx.ALIGN_CENTER_VERTICAL)
         self._outputPathCtrl = wx.ComboBox(panel, -1)
@@ -130,9 +130,9 @@ class PackageDocMainFrame(wx.Frame):
             self._outputPathCtrl.SetValue(list[len(list) - 1])
 
         subsizer.Add(self._outputPathCtrl, (4, 1), flag=wx.ALIGN_CENTER_VERTICAL|wx.EXPAND)
-        self._outputPathBt = wx.BitmapButton(panel, -1, bitmap=wx.ArtProvider_GetBitmap(wx.ART_FILE_OPEN))
+        self._outputPathBt = wx.BitmapButton(panel, -1, bitmap=wx.ArtProvider.GetBitmap(wx.ART_FILE_OPEN))
         subsizer.Add(self._outputPathBt, (4, 2), flag=wx.ALIGN_CENTER_VERTICAL|wx.EXPAND)
-        wx.EVT_BUTTON(self._outputPathBt, self._outputPathBt.GetId(), self.OnBrowsePath)
+        self.Bind(wx.EVT_BUTTON, self.OnBrowsePath, self._outputPathBt)
 
         subsizer.Add(wx.StaticText(panel, -1, "Architecture Specified : "), (5, 0), flag=wx.ALIGN_CENTER_VERTICAL)
         self._archCtrl = wx.ComboBox(panel, -1, value='ALL', choices=['ALL', 'IA32/MSFT', 'IA32/GNU', 'X64/INTEL', 'X64/GNU', 'IPF/MSFT', 'IPF/GNU', 'EBC/INTEL'],
@@ -164,7 +164,7 @@ class PackageDocMainFrame(wx.Frame):
     def SaveConfigure(self, name, value):
         if value ==None or len(value) == 0:
             return
-        config = wx.ConfigBase_Get()
+        config = wx.ConfigBase.Get()
         oldvalues = config.Read(name, '').split(';')
         if len(oldvalues) >= 10:
             oldvalues.remove(oldvalues[0])
@@ -177,7 +177,7 @@ class PackageDocMainFrame(wx.Frame):
         config.Write(name, ';'.join(oldvalues))
 
     def GetConfigure(self, name):
-        config = wx.ConfigBase_Get()
+        config = wx.ConfigBase.Get()
         values = config.Read(name, '').split(';')
         list = []
         for item in values:
@@ -416,10 +416,10 @@ class ProgressDialog(wx.Dialog):
         logging.getLogger('').addHandler(self._loghandle)
         logging.getLogger('app').addHandler(self._loghandle)
 
-        wx.EVT_BUTTON(self._closeBt, self._closeBt.GetId(), self.OnButtonClose)
-        wx.EVT_UPDATE_UI(self, self._closeBt.GetId(), self.OnUpdateCloseButton)
-        wx.EVT_BUTTON(self._gotoOuputBt, self._gotoOuputBt.GetId(), self.OnGotoOutput)
-        EVT_LOG(self, self.OnPostLog)
+        self.Bind(wx.EVT_BUTTON, self.OnButtonClose, self._closeBt)
+        self.Bind(wx.EVT_UPDATE_UI, self.OnUpdateCloseButton)
+        self.Bind(wx.EVT_BUTTON, self.OnGotoOutput, self._gotoOuputBt)
+        self.Bind(EVT_LOG, self.OnPostLog)
 
         self._process     = None
         self._pid         = None
@@ -720,7 +720,7 @@ class ProgressDialog(wx.Dialog):
             lines = f.readlines()
             f.close()
             bfound = False
-            for index in xrange(len(lines)):
+            for index in range(len(lines)):
                 if lines[index].find('<a class="el" href="files.html" target="basefrm">File List</a>') != -1:
                     lines[index] = "<!-- %s" % lines[index]
                     bfound = True
@@ -745,7 +745,7 @@ class ProgressDialog(wx.Dialog):
             lines = f.readlines()
             f.close()
             bfound = False
-            for index in xrange(len(lines)):
+            for index in range(len(lines)):
                 if not bfound:
                     if lines[index].find('<param name="Local" value="files.html">') != -1:
                         lines[index] = '<!-- %s' % lines[index]
@@ -969,7 +969,7 @@ class ProgressDialog(wx.Dialog):
             fd = open(path, 'r')
             text = fd.read()
             fd.close()
-        except Exception, e:
+        except Exception as e:
             self.LogMessage ("   <<<Fail to open file %s" % path)
             return
         text = text.replace ('.s.dox', '.s')
@@ -982,7 +982,7 @@ class ProgressDialog(wx.Dialog):
             fd = open(path, 'w')
             fd.write(text)
             fd.close()
-        except Exception, e:
+        except Exception as e:
             self.LogMessage ("    <<<Fail to fixup file %s" % path)
             return
         self.LogMessage('    >>> Finish to fixup .dox postfix for file %s \n' % path)
@@ -993,7 +993,7 @@ class ProgressDialog(wx.Dialog):
             fd = open(path, 'r')
             lines = fd.readlines()
             fd.close()
-        except Exception, e:
+        except Exception as e:
             self.LogMessage ("   <<<Fail to open file %s" % path)
             return
         for line in lines:
@@ -1004,7 +1004,7 @@ class ProgressDialog(wx.Dialog):
             fd = open(path, 'w')
             fd.write("".join(lines))
             fd.close()
-        except Exception, e:
+        except Exception as e:
             self.LogMessage ("    <<<Fail to fixup file %s" % path)
             return
         self.LogMessage('    >>> Finish to fixup .decdoxygen postfix for file %s \n' % path)
diff --git a/BaseTools/Scripts/PackageDocumentTools/plugins/EdkPlugins/basemodel/doxygen.py b/BaseTools/Scripts/PackageDocumentTools/plugins/EdkPlugins/basemodel/doxygen.py
index d1e21135cf..4b3303c658 100644
--- a/BaseTools/Scripts/PackageDocumentTools/plugins/EdkPlugins/basemodel/doxygen.py
+++ b/BaseTools/Scripts/PackageDocumentTools/plugins/EdkPlugins/basemodel/doxygen.py
@@ -11,8 +11,6 @@
 # WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
 #
 
-from __future__ import print_function
-from __future__ import absolute_import
 import os
 
 from .message import *
@@ -67,7 +65,7 @@ class Page(BaseDoxygeItem):
 
     def AddSection(self, section):
         self.mSections.append(section)
-        self.mSections.sort(cmp=lambda x, y: cmp(x.mName.lower(), y.mName.lower()))
+        self.mSections.sort(key=lambda x: x.mName.lower())
 
     def Generate(self):
         if self.mIsMainPage:
@@ -80,7 +78,7 @@ class Page(BaseDoxygeItem):
             self.mText.append(self.mDescription)
         endIndex = len(self.mText)
 
-        self.mSections.sort()
+        self.mSections.sort(key=lambda x: x.mName.lower())
         for sect in self.mSections:
             self.mText += sect.Generate()
 
@@ -92,7 +90,7 @@ class Page(BaseDoxygeItem):
             self.mText.insert(endIndex, '<ul>')
             endIndex += 1
             if self.mIsSort:
-                self.mSubPages.sort(cmp=lambda x, y: cmp(x.mName.lower(), y.mName.lower()))
+                self.mSubPages.sort(key=lambda x: x.mName.lower())
             for page in self.mSubPages:
                 self.mText.insert(endIndex, '<li>\subpage %s \"%s\" </li>' % (page.mTag, page.mName))
                 endIndex += 1
diff --git a/BaseTools/Scripts/PackageDocumentTools/plugins/EdkPlugins/basemodel/efibinary.py b/BaseTools/Scripts/PackageDocumentTools/plugins/EdkPlugins/basemodel/efibinary.py
index 290287b817..d522e33c4a 100644
--- a/BaseTools/Scripts/PackageDocumentTools/plugins/EdkPlugins/basemodel/efibinary.py
+++ b/BaseTools/Scripts/PackageDocumentTools/plugins/EdkPlugins/basemodel/efibinary.py
@@ -11,7 +11,6 @@
 # WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
 #
 
-from __future__ import print_function
 import array
 import uuid
 import re
diff --git a/BaseTools/Scripts/PackageDocumentTools/plugins/EdkPlugins/basemodel/ini.py b/BaseTools/Scripts/PackageDocumentTools/plugins/EdkPlugins/basemodel/ini.py
index 6e6f3f4b97..d5299e60bc 100644
--- a/BaseTools/Scripts/PackageDocumentTools/plugins/EdkPlugins/basemodel/ini.py
+++ b/BaseTools/Scripts/PackageDocumentTools/plugins/EdkPlugins/basemodel/ini.py
@@ -11,7 +11,6 @@
 # WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
 #
 
-from __future__ import absolute_import
 from .message import *
 import re
 import os
@@ -25,7 +24,7 @@ class BaseINIFile(object):
         @return: instance of this class
 
         """
-        if len(args) == 0: return object.__new__(cls, *args, **kwargs)
+        if len(args) == 0: return object.__new__(cls)
         filename = args[0]
         parent   = None
         if len(args) > 1:
@@ -33,7 +32,7 @@ class BaseINIFile(object):
 
         key = os.path.normpath(filename)
         if key not in cls._objs.keys():
-            cls._objs[key] = object.__new__(cls, *args, **kwargs)
+            cls._objs[key] = object.__new__(cls)
 
         if parent is not None:
             cls._objs[key].AddParent(parent)
diff --git a/BaseTools/Scripts/PackageDocumentTools/plugins/EdkPlugins/edk2/model/baseobject.py b/BaseTools/Scripts/PackageDocumentTools/plugins/EdkPlugins/edk2/model/baseobject.py
index b49c87c8bd..f123f6a915 100644
--- a/BaseTools/Scripts/PackageDocumentTools/plugins/EdkPlugins/edk2/model/baseobject.py
+++ b/BaseTools/Scripts/PackageDocumentTools/plugins/EdkPlugins/edk2/model/baseobject.py
@@ -10,12 +10,12 @@
 # THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
 # WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
 
-import plugins.EdkPlugins.basemodel.ini as ini
-import plugins.EdkPlugins.edk2.model.dsc as dsc
-import plugins.EdkPlugins.edk2.model.inf as inf
-import plugins.EdkPlugins.edk2.model.dec as dec
+from ...basemodel import ini as ini
+from ..model import dsc as dsc
+from ..model import inf as inf
+from ..model import dec as dec
 import os
-from plugins.EdkPlugins.basemodel.message import *
+from ...basemodel.message import *
 
 class SurfaceObject(object):
     _objs = {}
@@ -25,7 +25,7 @@ class SurfaceObject(object):
         @return: instance of this class
 
         """
-        obj = object.__new__(cls, *args, **kwargs)
+        obj = object.__new__(cls)
         if "None" not in cls._objs:
             cls._objs["None"] = []
         cls._objs["None"].append(obj)
@@ -846,7 +846,7 @@ class SurfaceItem(object):
                 ErrorMsg("%s item is duplicated defined in packages: %s and %s" %
                          (name, parent.GetFilename(), cls._objs[name].GetParent().GetFilename()))
                 return None
-            obj = object.__new__(cls, *args, **kwargs)
+            obj = object.__new__(cls)
             cls._objs[name] = obj
             return obj
         elif issubclass(parent.__class__, Module):
diff --git a/BaseTools/Scripts/PackageDocumentTools/plugins/EdkPlugins/edk2/model/dec.py b/BaseTools/Scripts/PackageDocumentTools/plugins/EdkPlugins/edk2/model/dec.py
index 9ff0df3851..3d210f72ac 100644
--- a/BaseTools/Scripts/PackageDocumentTools/plugins/EdkPlugins/edk2/model/dec.py
+++ b/BaseTools/Scripts/PackageDocumentTools/plugins/EdkPlugins/edk2/model/dec.py
@@ -11,9 +11,9 @@
 # WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
 #
 
-import plugins.EdkPlugins.basemodel.ini as ini
+from ...basemodel import ini
 import re, os
-from plugins.EdkPlugins.basemodel.message import *
+from ...basemodel.message import *
 
 class DECFile(ini.BaseINIFile):
 
diff --git a/BaseTools/Scripts/PackageDocumentTools/plugins/EdkPlugins/edk2/model/doxygengen.py b/BaseTools/Scripts/PackageDocumentTools/plugins/EdkPlugins/edk2/model/doxygengen.py
index c22d362ff3..25b6a613b1 100644
--- a/BaseTools/Scripts/PackageDocumentTools/plugins/EdkPlugins/edk2/model/doxygengen.py
+++ b/BaseTools/Scripts/PackageDocumentTools/plugins/EdkPlugins/edk2/model/doxygengen.py
@@ -16,7 +16,7 @@
 """This file produce action class to generate doxygen document for edk2 codebase.
    The action classes are shared by GUI and command line tools.
 """
-import plugins.EdkPlugins.basemodel.doxygen as doxygen
+from ...basemodel import doxygen
 import os
 try:
     import wx
@@ -24,9 +24,9 @@ try:
 except:
     gInGui = False
 import re
-import plugins.EdkPlugins.edk2.model.inf as inf
-import plugins.EdkPlugins.edk2.model.dec as dec
-from plugins.EdkPlugins.basemodel.message import *
+from ..model import inf
+from ..model import dec
+from ...basemodel.message import *
 
 _ignore_dir = ['.svn', '_svn', 'cvs']
 _inf_key_description_mapping_table = {
@@ -386,7 +386,7 @@ class PackageDocumentAction(DoxygenAction):
         configFile.AddFile(path)
 
         no = 0
-        for no in xrange(len(lines)):
+        for no in range(len(lines)):
             if len(lines[no].strip()) == 0:
                 continue
             if lines[no].strip()[:2] in ['##', '//', '/*', '*/']:
@@ -1000,7 +1000,7 @@ class PackageDocumentAction(DoxygenAction):
         #file = textfile.TextFile(path)
 
         try:
-            file = open(path, 'rb')
+            file = open(path, 'r')
         except (IOError, OSError) as msg:
             return None
 
diff --git a/BaseTools/Scripts/PackageDocumentTools/plugins/EdkPlugins/edk2/model/doxygengen_spec.py b/BaseTools/Scripts/PackageDocumentTools/plugins/EdkPlugins/edk2/model/doxygengen_spec.py
index 4bae6968a9..c9f67f2e40 100644
--- a/BaseTools/Scripts/PackageDocumentTools/plugins/EdkPlugins/edk2/model/doxygengen_spec.py
+++ b/BaseTools/Scripts/PackageDocumentTools/plugins/EdkPlugins/edk2/model/doxygengen_spec.py
@@ -13,7 +13,7 @@
 # THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
 # WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
 
-import plugins.EdkPlugins.basemodel.doxygen as doxygen
+from ...basemodel import doxygen
 import os
 try:
     import wx
@@ -21,9 +21,9 @@ try:
 except:
     gInGui = False
 import re
-import plugins.EdkPlugins.edk2.model.inf as inf
-import plugins.EdkPlugins.edk2.model.dec as dec
-from plugins.EdkPlugins.basemodel.message import *
+from ..model import inf
+from ..model import dec
+from ...basemodel.message import *
 
 _ignore_dir = ['.svn', '_svn', 'cvs']
 _inf_key_description_mapping_table = {
@@ -388,7 +388,7 @@ class PackageDocumentAction(DoxygenAction):
         configFile.AddFile(path)
         return
         no = 0
-        for no in xrange(len(lines)):
+        for no in range(len(lines)):
             if len(lines[no].strip()) == 0:
                 continue
             if lines[no].strip()[:2] in ['##', '//', '/*', '*/']:
@@ -1003,7 +1003,7 @@ class PackageDocumentAction(DoxygenAction):
         #file = textfile.TextFile(path)
 
         try:
-            file = open(path, 'rb')
+            file = open(path, 'r')
         except (IOError, OSError) as msg:
             return None
 
diff --git a/BaseTools/Scripts/PackageDocumentTools/plugins/EdkPlugins/edk2/model/dsc.py b/BaseTools/Scripts/PackageDocumentTools/plugins/EdkPlugins/edk2/model/dsc.py
index 0628fa7408..6f59e566b8 100644
--- a/BaseTools/Scripts/PackageDocumentTools/plugins/EdkPlugins/edk2/model/dsc.py
+++ b/BaseTools/Scripts/PackageDocumentTools/plugins/EdkPlugins/edk2/model/dsc.py
@@ -11,9 +11,9 @@
 # WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
 #
 
-import plugins.EdkPlugins.basemodel.ini as ini
+from ...basemodel import ini
 import re, os
-from plugins.EdkPlugins.basemodel.message import *
+from ...basemodel.message import *
 
 class DSCFile(ini.BaseINIFile):
     def GetSectionInstance(self, parent, name, isCombined=False):
diff --git a/BaseTools/Scripts/PackageDocumentTools/plugins/EdkPlugins/edk2/model/inf.py b/BaseTools/Scripts/PackageDocumentTools/plugins/EdkPlugins/edk2/model/inf.py
index 793e95efed..cf2e49d3af 100644
--- a/BaseTools/Scripts/PackageDocumentTools/plugins/EdkPlugins/edk2/model/inf.py
+++ b/BaseTools/Scripts/PackageDocumentTools/plugins/EdkPlugins/edk2/model/inf.py
@@ -11,9 +11,9 @@
 # WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
 #
 
-import plugins.EdkPlugins.basemodel.ini as ini
+from ...basemodel import ini
 import re, os
-from plugins.EdkPlugins.basemodel.message import *
+from ...basemodel.message import *
 
 class INFFile(ini.BaseINIFile):
     _libobjs = {}