[issue22101] collections.abc.Set doesn't provide copy() method

[Akira Li]

New submission from Akira Li:

The documentation for standard types says [1]:

  clear() and copy() are included for consistency with the interfaces of
  mutable containers that don’t support slicing operations (such as dict
  and set)

  New in version 3.3: clear() and copy() methods.

[1] https://docs.python.org/3.4/library/stdtypes.html#immutable-sequence-types

but collections.abc documentation mentions only clear() method.

I've uploaded a patch that implements Set.copy() method, mentions it in
Set's documentation, and adds a sanity test.

----------
components: Library (Lib)
files: set-copy.patch
keywords: patch
messages: 224255
nosy: akira
priority: normal
severity: normal
status: open
title: collections.abc.Set doesn't provide copy() method
type: behavior
versions: Python 3.4, Python 3.5
Added file: http://bugs.python.org/file36153/set-copy.patch

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