Compare types with "is not" instead of "!="

pycodestyle was complaining about this.

simpinkscr/simple_inkscape_scripting.py

@@ -485,14 +485,14 @@ def __repr__(self):
     def __eq__(self, other):
         '''Two SimpleObjects are equal if they encapsulate the same
         inkex object.'''
-        if type(self) != type(other):
+        if type(self) is not type(other):
             return NotImplemented
         return self.get_inkex_object() == other.get_inkex_object()
 
     def __ne__(self, other):
         '''Two SimpleObjects are unequal if they do not encapsulate the
         same inkex object.'''
-        if type(self) != type(other):
+        if type(self) is not type(other):
             return NotImplemented
         return self.get_inkex_object() != other.get_inkex_object()