From 03f7aaf953f00bf2953c21a057d8e6e88db659c8 Mon Sep 17 00:00:00 2001 From: Raymond Hettinger Date: Wed, 3 Apr 2024 10:08:18 -0500 Subject: [PATCH] gh-117215 Make the fromskey() signature match dict.fromkeys(). (gh-117493) --- Lib/collections/__init__.py | 6 +++--- 1 file changed, 3 insertions(+), 3 deletions(-) diff --git a/Lib/collections/__init__.py b/Lib/collections/__init__.py index 2a35989ee25..d06d84cbdfc 100644 --- a/Lib/collections/__init__.py +++ b/Lib/collections/__init__.py @@ -1038,9 +1038,9 @@ class ChainMap(_collections_abc.MutableMapping): return f'{self.__class__.__name__}({", ".join(map(repr, self.maps))})' @classmethod - def fromkeys(cls, iterable, *args): - 'Create a ChainMap with a single dict created from the iterable.' - return cls(dict.fromkeys(iterable, *args)) + def fromkeys(cls, iterable, value=None, /): + 'Create a new ChainMap with keys from iterable and values set to value.' + return cls(dict.fromkeys(iterable, value)) def copy(self): 'New ChainMap or subclass with a new copy of maps[0] and refs to maps[1:]'