Use 'is None' instead of '== None'

bumblebee/engine.py

@@ -288,7 +288,7 @@ class Engine(object):
         for module in self._modules:
             self._current_module = module
             module.update_wrapper(module.widgets())
-            if module.error == None:
+            if module.error is None:
                 if module.minimized():
                     widget = module.minimizedWidget()
                     widget.link_module(module)

bumblebee/modules/cmus.py

@@ -49,7 +49,7 @@ class Module(bumblebee.engine.Module):
         self._tags = defaultdict(lambda: '')
 
     def hidden(self):
-        return self._status == None
+        return self._status is None
 
     @scrollable
     def description(self, widget):

bumblebee/modules/indicator.py

@@ -18,7 +18,7 @@ class Module(bumblebee.engine.Module):
         self.status = False
         super(Module,self).__init__(engine, config, widgets)
         self._include = tuple(filter(len, self.parameter("include", "NumLock,CapsLock").split(",")))
-        self._signalType = self.parameter("signaltype") if not self.parameter("signaltype") == None else "warning"
+        self._signalType = self.parameter("signaltype") if not self.parameter("signaltype") is None else "warning"
 
     def update(self, widgets):
         self._update_widgets(widgets)

bumblebee/modules/mpd.py

@@ -56,7 +56,7 @@ class Module(bumblebee.engine.Module):
         self._tags = defaultdict(lambda: '')
 
     def hidden(self):
-        return self._status == None
+        return self._status is None
 
     @scrollable
     def description(self, widget):

bumblebee/modules/xrandr.py

@@ -64,7 +64,7 @@ class Module(bumblebee.engine.Module):
 
             neighbor = first_neighbor if event["button"] == bumblebee.input.LEFT_MOUSE else last_neighbor
 
-            if neighbor == None:
+            if neighbor is None:
                 bumblebee.util.execute("{} --output {} --auto".format(toggle_cmd, widget.name))
             else:
                 bumblebee.util.execute("{} --output {} --auto --{}-of {}".format(toggle_cmd, widget.name,

bumblebee/theme.py

@@ -102,7 +102,7 @@ class Theme(object):
 
     def icon(self, widget):
         icon = self._get(widget, "icon", None)
-        if icon == None:
+        if icon is None:
             return self._get(widget, "prefix", None)
 
     def padding(self, widget):