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inspect.signature() doesn't support partialmethod without explicit self parameter #74335

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serhiy-storchaka opened this issue Apr 23, 2017 · 5 comments
Closed

inspect.signature() doesn't support partialmethod without explicit self parameter #74335

serhiy-storchaka opened this issue Apr 23, 2017 · 5 comments
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3.7 (EOL) end of life stdlib Python modules in the Lib dir type-bug An unexpected behavior, bug, or error

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@serhiy-storchaka
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BPO 30149
Nosy @rhettinger, @ncoghlan, @serhiy-storchaka, @1st1, @corona10
PRs
  • bpo-30149: Fix partialmethod without explicit self parameter. #1308
  • [3.6] bpo-30149: Fix partialmethod without explicit self parameter (#1308) #1662
  • [3.5] bpo-30149: Fix partialmethod without explicit self parameter (#1308) #1663
    		•

    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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    GitHub fields:

    assignee = None
closed_at = <Date 2017-06-15.14:44:19.469>
created_at = <Date 2017-04-23.20:18:25.285>
labels = ['3.7', 'type-bug', 'library']
title = "inspect.signature() doesn't support partialmethod without explicit self parameter"
updated_at = <Date 2017-06-15.14:44:19.468>
user = 'https://github.com/serhiy-storchaka'

    bugs.python.org fields:

    activity = <Date 2017-06-15.14:44:19.468>
actor = 'serhiy.storchaka'
assignee = 'none'
closed = True
closed_date = <Date 2017-06-15.14:44:19.469>
closer = 'serhiy.storchaka'
components = ['Library (Lib)']
creation = <Date 2017-04-23.20:18:25.285>
creator = 'serhiy.storchaka'
dependencies = []
files = []
hgrepos = []
issue_num = 30149
keywords = []
message_count = 5.0
messages = ['292184', '292380', '293877', '296101', '296102']
nosy_count = 5.0
nosy_names = ['rhettinger', 'ncoghlan', 'serhiy.storchaka', 'yselivanov', 'corona10']
pr_nums = ['1308', '1662', '1663']
priority = 'normal'
resolution = 'fixed'
stage = 'resolved'
status = 'closed'
superseder = None
type = 'behavior'
url = 'https://bugs.python.org/issue30149'
versions = ['Python 3.5', 'Python 3.6', 'Python 3.7']
    @serhiy-storchaka
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    >>> import functools, inspect
>>> class A:
...     f = functools.partialmethod((lambda self, x, y, *args: ...), 1)
... 
>>> inspect.signature(A.f)
<Signature (self, y, *args)>
>>> class A:
...     f = functools.partialmethod((lambda *args: ...), 1)
... 
>>> inspect.signature(A.f)
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
  File "/home/serhiy/py/cpython/Lib/inspect.py", line 3007, in signature
    return Signature.from_callable(obj, follow_wrapped=follow_wrapped)
  File "/home/serhiy/py/cpython/Lib/inspect.py", line 2757, in from_callable
    follow_wrapper_chains=follow_wrapped)
  File "/home/serhiy/py/cpython/Lib/inspect.py", line 2227, in _signature_from_callable
    return sig.replace(parameters=new_params)
  File "/home/serhiy/py/cpython/Lib/inspect.py", line 2780, in replace
    return_annotation=return_annotation)
  File "/home/serhiy/py/cpython/Lib/inspect.py", line 2725, in __init__
    raise ValueError(msg)
ValueError: duplicate parameter name: 'args'

    @serhiy-storchaka serhiy-storchaka added 3.7 (EOL) end of life stdlib Python modules in the Lib dir type-bug An unexpected behavior, bug, or error labels Apr 23, 2017
    @corona10
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    I submitted the PR for this issue.

    @1st1
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    1st1 commented May 17, 2017

    New changeset 378d706 by Yury Selivanov (Dong-hee Na) in branch 'master':
    bpo-30149: Fix partialmethod without explicit self parameter (bpo-1308)
    378d706

    @serhiy-storchaka
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    New changeset e45ea37 by Serhiy Storchaka (Dong-hee Na) in branch '3.6':
    bpo-30149: Fix partialmethod without explicit self parameter (bpo-1308) (bpo-1662)
    e45ea37

    @serhiy-storchaka
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    New changeset fb0825c by Serhiy Storchaka (Dong-hee Na) in branch '3.5':
    bpo-30149: Fix partialmethod without explicit self parameter (bpo-1308) (bpo-1663)
    fb0825c

    @ezio-melotti ezio-melotti transferred this issue from another repository Apr 10, 2022
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