Use types module for class inheritence instead

yes.py

@@ -1,4 +1,5 @@
 import inspect
+import types
 from io import StringIO
 import sys
 import re
@@ -6,7 +7,7 @@ import re
 did_you_mean = re.compile(r'Did you mean (.*)\?', re.IGNORECASE)
 what = 'what?'
 
-class Yes(sys.__class__):
+class Yes(types.ModuleType):
     def __init__(self, other):
         for attr in dir(other):
           setattr(self, attr, getattr(other, attr))