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set union method ignores arguments appearing after the original set #50822
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| BPO | 6573 |
|---|---|
| Nosy | @rhettinger |
| Files |
Note: these values reflect the state of the issue at the time it was migrated and might not reflect the current state.
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assignee = 'https://github.com/rhettinger'
closed_at = <Date 2009-07-27.20:33:44.642>
created_at = <Date 2009-07-25.15:24:20.292>
labels = []
title = 'set union method ignores arguments appearing after the original set'
updated_at = <Date 2009-07-27.20:33:44.628>
user = 'https://bugs.python.org/ssmout'bugs.python.org fields:
activity = <Date 2009-07-27.20:33:44.628>
actor = 'rhettinger'
assignee = 'rhettinger'
closed = True
closed_date = <Date 2009-07-27.20:33:44.642>
closer = 'rhettinger'
components = []
creation = <Date 2009-07-25.15:24:20.292>
creator = 'ssmout'
dependencies = []
files = ['14565']
hgrepos = []
issue_num = 6573
keywords = ['patch']
message_count = 3.0
messages = ['90925', '90987', '90997']
nosy_count = 2.0
nosy_names = ['rhettinger', 'ssmout']
pr_nums = []
priority = 'high'
resolution = 'fixed'
stage = None
status = 'closed'
superseder = None
type = None
url = 'https://bugs.python.org/issue6573'
versions = ['Python 2.6', 'Python 3.1', 'Python 2.7', 'Python 3.2']Metadata
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ssmout commentedon Jul 25, 2009
When calling the union method of a set with several arguments, if one of
those sets is the original set, all arguments appearing after it are
ignored. For example:
evaluates to set([1]), not set([1, 2]) as expected. As another example,
since all empty frozensets are the same,
frozenset().union(frozenset([1]), frozenset(), frozenset([2]))
also evaluates to just frozenset([1]).
The fix is trivial, so I'm attaching a patch.
rhettinger commentedon Jul 27, 2009
Good catch. Thanks.
rhettinger commentedon Jul 27, 2009
Fixed. See r74226, r74227, r74228 and r74229.