ndframe and index __copy__ are now proper methods

Author: bmcfee

pandas/core/generic.py

@@ -3156,7 +3156,8 @@ def copy(self, deep=True):
         data = self._data.copy(deep=deep)
         return self._constructor(data).__finalize__(self)
 
-    __copy__ = copy
+    def __copy__(self, deep=True):
+        return self.copy(deep=deep)
 
     def __deepcopy__(self, memo=None):
         if memo is None:

pandas/indexes/base.py

@@ -723,7 +723,8 @@ def copy(self, name=None, deep=False, dtype=None, **kwargs):
             new_index = new_index.astype(dtype)
         return new_index
 
-    __copy__ = copy
+    def __copy__(self, **kwargs):
+        return self.copy(**kwargs)
 
     def _validate_names(self, name=None, names=None, deep=False):
         """