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Raymond Hettinger 2012-01-26 00:15:07 -08:00
commit 4fd3f0c850
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Lib/collections/__init__.py
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@ -34,7 +34,7 @@ class OrderedDict(dict):
# The circular doubly linked list starts and ends with a sentinel element. # The circular doubly linked list starts and ends with a sentinel element.
# The sentinel element never gets deleted (this simplifies the algorithm). # The sentinel element never gets deleted (this simplifies the algorithm).
# The sentinel is in self.__hardroot with a weakref proxy in self.__root. # The sentinel is in self.__hardroot with a weakref proxy in self.__root.
# The prev/next links are weakref proxies (to prevent circular references). # The prev links are weakref proxies (to prevent circular references).
# Individual links are kept alive by the hard reference in self.__map. # Individual links are kept alive by the hard reference in self.__map.
# Those hard references disappear when a key is deleted from an OrderedDict. # Those hard references disappear when a key is deleted from an OrderedDict.