diff -r c02818d7e29f -r 7e61baa047f0 IDEFrame.py
--- a/IDEFrame.py	Mon Aug 14 22:30:41 2017 +0300
+++ b/IDEFrame.py	Mon Aug 14 23:27:15 2017 +0300
@@ -193,19 +193,24 @@
 
 import base64
 
+
 def EncodeFileSystemPath(path, use_base64=True):
     path = path.encode(sys.getfilesystemencoding())
     if use_base64:
         return base64.encodestring(path)
     return path
 
+
 def DecodeFileSystemPath(path, is_base64=True):
     if is_base64:
         path = base64.decodestring(path)
     return unicode(path, sys.getfilesystemencoding())
 
-# Compatibility function for wx versions < 2.6
+
 def AppendMenu(parent, help, id, kind, text):
+    """
+    Compatibility function for wx versions < 2.6
+    """
     if wx.VERSION >= (2, 6, 0):
         parent.Append(help=help, id=id, kind=kind, text=text)
     else:
@@ -215,6 +220,7 @@
  POUINSTANCEVARIABLESPANEL, LIBRARYTREE, SCALING, PAGETITLES
 ] = range(10)
 
+
 def GetShortcutKeyCallbackFunction(viewer_function):
     def ShortcutKeyFunction(self, event):
         control = self.FindFocus()
@@ -226,6 +232,7 @@
             control.ProcessEvent(event)
     return ShortcutKeyFunction
 
+
 def GetDeleteElementFunction(remove_function, parent_type=None, check_function=None):
     def DeleteElementFunction(self, selected):
         name = self.ProjectTree.GetItemText(selected)
@@ -245,6 +252,7 @@
     TAB_BORDER = 7
     NOTEBOOK_BORDER = 2
 
+
 def SimplifyTabLayout(tabs, rect):
     for tab in tabs:
         if tab["pos"][0] == rect.x:
@@ -278,6 +286,7 @@
                         return True
     return False
 
+
 def ComputeTabsLayout(tabs, rect):
     if len(tabs) == 0:
         return tabs
@@ -323,6 +332,7 @@
 
 UNEDITABLE_NAMES_DICT = dict([(_(name), name) for name in UNEDITABLE_NAMES])
 
+
 class IDEFrame(wx.Frame):
 
     # Compatibility function for wx versions < 2.6
@@ -2549,6 +2559,7 @@
 
 UPPER_DIV = lambda x, y: (x / y) + {True : 0, False : 1}[(x % y) == 0]
 
+
 class GraphicPrintout(wx.Printout):
     def __init__(self, viewer, page_size, margins, preview = False):
         wx.Printout.__init__(self)