ENH: Provide dict object for to_dict() pandas-dev#16122

Author: dwkenefick

doc/source/whatsnew/v0.20.1.txt

@@ -18,7 +18,6 @@ Highlights include:
 
 Enhancements
 ~~~~~~~~~~~~
-- ``Series.to_dict()`` and ``DataFrame.to_dict()`` now support an ``into`` keyword which allows you to specify the ``collections.Mapping`` subclass that you would like returned.  The default is ``dict``, which is backwards compatible. (:issue:`16122`)
 
 
 

doc/source/whatsnew/v0.21.0.txt

@@ -26,6 +26,7 @@ New features
 
 Other Enhancements
 ^^^^^^^^^^^^^^^^^^
+- ``Series.to_dict()`` and ``DataFrame.to_dict()`` now support an ``into`` keyword which allows you to specify the ``collections.Mapping`` subclass that you would like returned.  The default is ``dict``, which is backwards compatible. (:issue:`16122`)
 
 
 

pandas/core/common.py

@@ -483,22 +483,22 @@ def _dict_compat(d):
 
 def _standardize_mapping(into):
     """
-    Helper function to standardize the supplied mapping so it can 
+    Helper function to standardize the supplied mapping so it can
     be passed to the ``Series.to_dict()`` and ``DataFrame.to_dict()``
 
     Parameters
     ----------
     into : instance or subclass of collections.Mapping
         The argument supplied to ``to_dict``.  Must be a class, an
         initialized collections.defaultdict, or an empty instance
-        of a collections.Mapping subclass.  
+        of a collections.Mapping subclass.
 
     Returns
     -------
     mapping : a collections.Mapping subclass or other constructor
         a callable object that can accept an iterator to create
         the desired Mapping.
-        
+
     """
     if not inspect.isclass(into):
         if len(into) > 0:

pandas/core/frame.py

@@ -889,7 +889,7 @@ def to_dict(self, orient='dict', into=dict):
             instance of the mapping type you want.  If you want a
             collections.defaultdict, you must pass an initialized
             instance.
-            .. versionadded:: 0.20.1
+            .. versionadded:: 0.21.0
 
         Returns
         -------

pandas/core/series.py

@@ -9,7 +9,6 @@
 import types
 import warnings
 from textwrap import dedent
-import collections
 
 from numpy import nan, ndarray
 import numpy as np
@@ -1086,7 +1085,7 @@ def to_dict(self, into=dict):
             object. Can be the actual class or an empty
             instance of the mapping type you want.  If you want a
             collections.defaultdict, you must pass an initialized
-            .. versionadded:: 0.20.1
+            .. versionadded:: 0.21.0
 
         Returns
         -------
@@ -1098,7 +1097,6 @@ def to_dict(self, into=dict):
         into_c = _standardize_mapping(into)
         return into_c(compat.iteritems(self))
 
-
     def to_frame(self, name=None):
         """
         Convert Series to DataFrame