bpo-41621: Document defaultdict's default_factory parameter (GH-21945) · python/cpython@88a3342 · GitHub

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miss-islington

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sweeneyde

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bpo-41621: Document defaultdict's default_factory parameter (GH-21945)

It defaults to None and is positional only. (cherry picked from commit d1ae570) Co-authored-by: Dennis Sweeney <36520290+sweeneyde@users.noreply.github.com>

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• Doc/library
  • collections.rst
• Misc/NEWS.d/next/Documentation
  • 2020-08-24-13-35-04.bpo-41621.nqaw9G.rst
• Modules
  • _collectionsmodule.c

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‎Doc/library/collections.rst‎

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@@ -707,9 +707,9 @@ stack manipulations such as ``dup``, ``drop``, ``swap``, ``over``, ``pick``,
707	707	:class:`defaultdict` objects
708	708	----------------------------
709	709
710		- .. class:: defaultdict([default_factory[, ...]])
	710	+ .. class:: defaultdict(default_factory=None, /, [...])
711	711
712		- Returns a new dictionary-like object. :class:`defaultdict` is a subclass of the
	712	+ Return a new dictionary-like object. :class:`defaultdict` is a subclass of the
713	713	built-in :class:`dict` class. It overrides one method and adds one writable
714	714	instance variable. The remaining functionality is the same as for the
715	715	:class:`dict` class and is not documented here.

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@@ -0,0 +1 @@
	1	+ Document that :class:`collections.defaultdict` parameter ``default_factory`` defaults to None and is positional-only.

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‎Modules/_collectionsmodule.c‎

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@@ -2236,7 +2236,7 @@ defdict_init(PyObject *self, PyObject *args, PyObject *kwds)
2236	2236	}
2237	2237
2238	2238	PyDoc_STRVAR(defdict_doc,
2239		- "defaultdict(default_factory[, ...]) --> dict with default factory\n\
	2239	+ "defaultdict(default_factory=None, /, [...]) --> dict with default factory\n\
2240	2240	\n\
2241	2241	The default factory is called without arguments to produce\n\
2242	2242	a new value when a key is not present, in __getitem__ only.\n\

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