[Lint] Fix various pylint warnings and fixup code

* Use print function
 * Fix except as statements
 * Remove old twisted 8 code
 * Remove empty docstring
 * Refactor try statement to only contain the relevant import and
   disable pylint import msgs.
 * Use flake8 noqa and pylint comment and drop pyflakes workarounds.

deluge/common.py

@@ -8,6 +8,7 @@
 #
 
 """Common functions for various parts of Deluge to use."""
+from __future__ import print_function
 
 import base64
 import functools
@@ -1047,14 +1048,14 @@ def run_profiled(func, *args, **kwargs):
             if output_file:
                 profiler.dump_stats(output_file)
                 log.info("Profile stats saved to %s", output_file)
-                print "Profile stats saved to %s" % output_file
+                print("Profile stats saved to %s" % output_file)
             else:
                 import pstats
                 import StringIO
                 strio = StringIO.StringIO()
                 ps = pstats.Stats(profiler, stream=strio).sort_stats('cumulative')
                 ps.print_stats()
-                print strio.getvalue()
+                print(strio.getvalue())
 
         try:
             return profiler.runcall(func, *args)

deluge/plugins/WebUi/deluge/plugins/webui/core.py

@@ -50,8 +50,7 @@ class Core(CorePluginBase):
     @export
     def got_deluge_web(self):
         try:
-            from deluge.ui.web import server
-            assert server  # silence pyflakes
+            from deluge.ui.web import server  # noqa pylint: disable=unused-import
             return True
         except ImportError:
             return False

deluge/tests/common.py

@@ -7,6 +7,8 @@
 # See LICENSE for more details.
 #
 
+from __future__ import print_function
+
 import os
 import sys
 import tempfile
@@ -64,7 +66,7 @@ def add_watchdog(deferred, timeout=0.05, message=None):
             watchdog.cancel()
         if not deferred.called:
             if message:
-                print message
+                print(message)
             deferred.cancel()
         return value
 
@@ -190,7 +192,7 @@ class ProcessOutputHandler(protocol.ProcessProtocol):
         if self.check_callbacks(data):
             pass
         elif '[ERROR' in data:
-            print data,
+            print(data, end=' ')
 
     def errReceived(self, data):  # NOQA
         """Process output from stderr"""
@@ -201,7 +203,7 @@ class ProcessOutputHandler(protocol.ProcessProtocol):
             return
         data = "\n%s" % data.strip()
         prefixed = data.replace("\n", "\nSTDERR: ")
-        print "\n%s" % prefixed
+        print("\n%s" % prefixed)
 
 
 def start_core(listen_port=58846, logfile=None, timeout=10, timeout_msg=None,

deluge/tests/daemon_base.py

@@ -1,3 +1,5 @@
+from __future__ import print_function
+
 import os.path
 
 import pytest
@@ -20,7 +22,7 @@ class DaemonBase(object):
     def terminate_core(self, *args):
         if args[0] is not None:
             if hasattr(args[0], "getTraceback"):
-                print "terminate_core: Errback Exception: %s" % args[0].getTraceback()
+                print("terminate_core: Errback Exception: %s" % args[0].getTraceback())
 
         if not self.core.killed:
             d = self.core.kill()

deluge/tests/test_files_tab.py

@@ -1,3 +1,5 @@
+from __future__ import print_function
+
 import pytest
 from twisted.trial import unittest
 
@@ -46,7 +48,7 @@ class FilesTabTestCase(BaseTestCase):
         level = 1
 
         def p_level(s, l):
-            print "%s%s" % (" " * l, s)
+            print("%s%s" % (" " * l, s))
 
         def _print_treestore_children(i, lvl):
             while i:
@@ -55,9 +57,9 @@ class FilesTabTestCase(BaseTestCase):
                     _print_treestore_children(treestore.iter_children(i), lvl + 2)
                 i = treestore.iter_next(i)
 
-        print "\n%s" % title
+        print("\n%s" % title)
         _print_treestore_children(root, level)
-        print ""
+        print("")
 
     def verify_treestore(self, treestore, tree):
 

deluge/tests/test_httpdownloader.py

@@ -7,6 +7,7 @@ from twisted.python.failure import Failure
 from twisted.trial import unittest
 from twisted.web.error import PageRedirect
 from twisted.web.http import NOT_MODIFIED
+from twisted.web.resource import Resource
 from twisted.web.server import Site
 from twisted.web.util import redirectTo
 
@@ -14,13 +15,6 @@ from deluge.httpdownloader import download_file
 from deluge.log import setup_logger
 from deluge.ui.web.common import compress
 
-try:
-    from twisted.web.resource import Resource
-except ImportError:
-    # twisted 8
-    from twisted.web.error import Resource
-
-
 temp_dir = tempfile.mkdtemp()
 
 

deluge/tests/test_torrentview.py

@@ -8,20 +8,21 @@ from deluge.ui.util import lang
 from . import common
 from .basetest import BaseTestCase
 
-libs_available = True
 # Allow running other tests without GTKUI dependencies available
 try:
     from gobject import TYPE_UINT64
-    from deluge.ui.gtkui.mainwindow import MainWindow
-    from deluge.ui.gtkui.menubar import MenuBar
-    from deluge.ui.gtkui.torrentdetails import TorrentDetails
-    from deluge.ui.gtkui.torrentview import TorrentView
-    from deluge.ui.gtkui.gtkui import DEFAULT_PREFS
 except ImportError as err:
     libs_available = False
     TYPE_UINT64 = "Whatever"
     import traceback
     traceback.print_exc()
+else:
+    libs_available = True
+    from deluge.ui.gtkui.mainwindow import MainWindow  # pylint: disable=ungrouped-imports
+    from deluge.ui.gtkui.menubar import MenuBar
+    from deluge.ui.gtkui.torrentdetails import TorrentDetails
+    from deluge.ui.gtkui.torrentview import TorrentView
+    from deluge.ui.gtkui.gtkui import DEFAULT_PREFS
 
 lang.setup_translations()
 

deluge/tests/test_webserver.py

@@ -26,9 +26,6 @@ class WebServerTestCase(WebServerTestBase, WebServerMockBase):
 
     @defer.inlineCallbacks
     def test_get_torrent_info(self):
-        """
-
-        """
         agent = Agent(reactor)
 
         self.mock_authentication_ignore(self.deluge_web.auth)

deluge/ui/gtkui/preferences.py

@@ -150,8 +150,7 @@ class Preferences(component.Component):
 
         if not deluge.common.osx_check() and not deluge.common.windows_check():
             try:
-                import appindicator
-                assert appindicator  # silence pyflakes
+                import appindicator  # noqa pylint: disable=unused-import
             except ImportError:
                 pass
             else:

deluge/ui/tracker_icons.py

@@ -15,25 +15,19 @@ from urlparse import urljoin, urlparse
 
 from twisted.internet import defer, threads
 from twisted.web.error import PageRedirect
+from twisted.web.resource import ForbiddenResource, NoResource
 
 from deluge.component import Component
 from deluge.configmanager import get_config_dir
 from deluge.decorators import proxy
 from deluge.httpdownloader import download_file
 
-try:
-    from twisted.web.resource import NoResource, ForbiddenResource
-except ImportError:
-    # twisted 8
-    from twisted.web.error import NoResource, ForbiddenResource
-
 try:
     import PIL.Image as Image
-    import deluge.ui.Win32IconImagePlugin
-    assert deluge.ui.Win32IconImagePlugin  # silence pyflakes
 except ImportError:
     PIL_INSTALLED = False
 else:
+    import deluge.ui.Win32IconImagePlugin  # noqa pylint: disable=unused-import, ungrouped-imports
     PIL_INSTALLED = True
 
 log = logging.getLogger(__name__)

msgfmt.py

@@ -25,6 +25,7 @@ Options:
     --version
         Display version information and exit.
 """
+from __future__ import print_function
 
 import array
 import ast
@@ -42,9 +43,9 @@ def usage(ecode, msg=''):
     """
     Print usage and msg and exit with given code.
     """
-    print >> sys.stderr, __doc__
+    print(__doc__, file=sys.stderr)
     if msg:
-        print >> sys.stderr, msg
+        print(msg, file=sys.stderr)
     sys.exit(ecode)
 
 
@@ -115,8 +116,8 @@ def make(filename, outfile):
     try:
         with open(infile) as _file:
             lines = _file.readlines()
-    except IOError, msg:
-        print >> sys.stderr, msg
+    except IOError as msg:
+        print(msg, file=sys.stderr)
         sys.exit(1)
 
     section = None
@@ -170,8 +171,8 @@ def make(filename, outfile):
         elif section == section_str:
             msgstr += l
         else:
-            print >> sys.stderr, 'Syntax error on %s:%d' % (infile, lno), 'before:'
-            print >> sys.stderr, l
+            print('Syntax error on %s:%d' % (infile, lno), 'before:', file=sys.stderr)
+            print(l, file=sys.stderr)
             sys.exit(1)
     # Add last entry
     if section == section_str:
@@ -183,15 +184,15 @@ def make(filename, outfile):
     try:
         with open(outfile, "wb") as _file:
             _file.write(output)
-    except IOError, msg:
-        print >> sys.stderr, msg
+    except IOError as msg:
+        print(msg, file=sys.stderr)
 
 
 def main():
     try:
         opts, args = getopt.getopt(sys.argv[1:], 'hVo:',
                                    ['help', 'version', 'output-file='])
-    except getopt.error, msg:
+    except getopt.error as msg:
         usage(1, msg)
 
     outfile = None
@@ -200,14 +201,14 @@ def main():
         if opt in ('-h', '--help'):
             usage(0)
         elif opt in ('-V', '--version'):
-            print >> sys.stderr, "msgfmt.py", __version__
+            print("msgfmt.py", __version__, file=sys.stderr)
             sys.exit(0)
         elif opt in ('-o', '--output-file'):
             outfile = arg
     # do it
     if not args:
-        print >> sys.stderr, 'No input file given'
-        print >> sys.stderr, "Try `msgfmt --help' for more information."
+        print('No input file given', file=sys.stderr)
+        print("Try `msgfmt --help' for more information.", file=sys.stderr)
         return
 
     for filename in args:

setup.py

@@ -232,8 +232,8 @@ class Build(_build):
         try:
             from deluge._libtorrent import lt
             print('Found libtorrent version: %s' % lt.__version__)
-        except ImportError, e:
-            print('Warning libtorrent not found: %s' % e)
+        except ImportError as ex:
+            print('Warning libtorrent not found: %s' % ex)
 
 
 class InstallData(_install_data):