[Python-Dev] The type of the result of the copy() method

[Brett Cannon]

It probably should be more consistent and I have a vague recollection that
this has been brought up before.

On Sun, Oct 29, 2017, 08:21 Serhiy Storchaka, <storchaka at gmail.com> wrote:

> The copy() methods of list, dict, bytearray, set, frozenset,
> WeakValueDictionary, WeakKeyDictionary return an instance of the base
> type containing the content of the original collection.
>
> The copy() methods of deque, defaultdict, OrderedDict, Counter,
> ChainMap, UserDict, UserList, WeakSet, ElementTree.Element return an
> instance of the same type as the original collection.
>
> The copy() method of mappingproxy returns a copy of the underlying
> mapping (using its copy() method).
>
> os.environ.copy() returns a dict.
>
> Shouldn't it be more consistent?
>
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