Comparisons to singletons like None should always be done with is or is not, never the equality operators.

py/Aircrack.py

@@ -26,14 +26,14 @@ class Aircrack(object):
 
 
     def is_running(self):
-        return self.pid.poll() == None
+        return self.pid.poll() is None
 
     def is_cracked(self):
         return os.path.exists(self.cracked_file)
 
     def stop(self):
         ''' Stops aircrack process '''
-        if self.pid.poll() == None:
+        if self.pid.poll() is None:
             self.pid.interrupt()
 
     def get_key_hex_ascii(self):
@@ -56,7 +56,7 @@ class Aircrack(object):
                 # Hex key is non-printable in ascii
                 ascii_key = None
                 continue
-            elif ascii_key == None:
+            elif ascii_key is None:
                 # We can't generate an Ascii key
                 continue
             # Convert decimal to char