Miscellaneous Python 3 fixes

IPython/config/loader.py

@@ -242,7 +242,7 b' class Config(dict):'
 
     def __deepcopy__(self, memo):
         import copy
-        return type(self)(copy.deepcopy(self.items()))
+        return type(self)(copy.deepcopy(list(self.items())))
     
     def __getitem__(self, key):
         # We cannot use directly self._is_section_key, because it triggers

IPython/core/formatters.py

@@ -168,7 +168,7 b' class DisplayFormatter(Configurable):'
     @property
     def format_types(self):
         """Return the format types (MIME types) of the active formatters."""
-        return self.formatters.keys()
+        return list(self.formatters.keys())
 
 
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