[Lint] Standardise except code

* Using 'ex' variable name for exceptions.

deluge/core/core.py

@@ -363,8 +363,8 @@ class Core(component.Component):
             for torrent_id in torrent_ids:
                 try:
                     self.torrentmanager.remove(torrent_id, remove_data=remove_data, save_state=False)
-                except InvalidTorrentError, ite:
-                    errors.append((torrent_id, ite))
+                except InvalidTorrentError as ex:
+                    errors.append((torrent_id, ex))
             # Save the session state
             self.torrentmanager.save_state()
             return errors

deluge/plugins/Blocklist/deluge/plugins/blocklist/gtkui.py

@@ -28,11 +28,7 @@ class GtkUI(GtkPluginBase):
         log.debug("Blocklist GtkUI enable..")
         self.plugin = component.get("PluginManager")
 
-        try:
-            self.load_preferences_page()
-        except Exception as err:
-            log.exception(err)
-            raise
+        self.load_preferences_page()
 
         self.status_item = component.get("StatusBar").add_item(
             image=common.get_resource("blocklist16.png"),
@@ -200,10 +196,10 @@ class GtkUI(GtkPluginBase):
         try:
             ip = common.IP.parse(new_text)
             model.set(model.get_iter_from_string(path_string), 0, ip.address)
-        except common.BadIP as e:
+        except common.BadIP as ex:
             model.remove(model.get_iter_from_string(path_string))
             from deluge.ui.gtkui import dialogs
-            d = dialogs.ErrorDialog(_("Bad IP address"), e.message)
+            d = dialogs.ErrorDialog(_("Bad IP address"), ex.message)
             d.run()
 
     def on_whitelist_treeview_selection_changed(self, selection):

deluge/ui/console/modes/add_util.py

@@ -70,8 +70,8 @@ def add_torrent(t_file, options, success_cb, fail_cb, ress):
 
             try:
                 TorrentInfo(f)
-            except Exception as e:
-                fail_cb(e.message, f, ress)
+            except Exception as ex:
+                fail_cb(ex.message, f, ress)
                 continue
 
             filename = os.path.split(f)[-1]