fix some import warnings and errors pointed out by pylint

gajim/common/app.py

@@ -30,13 +30,16 @@
 import os
 import logging
 import locale
-import gi
 import uuid
 from distutils.version import LooseVersion as V
+import gi
+import nbxmpp
 
 from gajim.common import config
-import nbxmpp
+from gajim.common import configpaths
 from gajim.common import ged as ged_module
+from gajim.common.contacts import LegacyContactsAPI
+from gajim.common.events import Events
 
 interface = None # The actual interface (the gtk one for the moment)
 thread_interface = None # Interface to run a thread and then a callback
@@ -54,7 +57,6 @@ log = logging.getLogger('gajim')
 
 logger = None
 
-from gajim.common import configpaths
 gajimpaths = configpaths.gajimpaths
 
 VCARD_PATH = gajimpaths['VCARD']
@@ -86,9 +88,6 @@ else:
 
 os_info = None # used to cache os information
 
-from gajim.common.contacts import LegacyContactsAPI
-from gajim.common.events import Events
-
 gmail_domains = ['gmail.com', 'googlemail.com']
 
 transport_type = {} # list the type of transport
@@ -182,7 +181,6 @@ try:
 except ImportError:
     HAVE_GPG = False
 else:
-    import os
     import subprocess
     def test_gpg(binary='gpg'):
         if os.name == 'nt':

gajim/common/commands.py

@@ -163,11 +163,11 @@ class ChangeStatusCommand(AdHocCommand):
         return False    # finish the session
 
 def find_current_groupchats(account):
-    import message_control
+    from gajim import message_control
     rooms = []
     for gc_control in app.interface.msg_win_mgr.get_controls(
-    message_control.TYPE_GC) + app.interface.minimized_controls[account].\
-    values():
+            message_control.TYPE_GC) + \
+            app.interface.minimized_controls[account].values():
         acct = gc_control.account
         # check if account is the good one
         if acct != account:

gajim/ipython_view.py

@@ -52,7 +52,7 @@ import re
 import sys
 import os
 from gi.repository import Pango
-from StringIO import StringIO
+from io import StringIO
 
 try:
     import IPython