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inspect.signature fails on some functions which use Argument Clinic #64360

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inspect.signature fails on some functions which use Argument Clinic#64360
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larryhastings
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type-bugAn unexpected behavior, bug, or error

Description

@serhiy-storchaka
serhiy-storchaka
opened on Jan 7, 2014
BPO 20161
Nosy @larryhastings, @serhiy-storchaka

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 = 'https://github.com/larryhastings'
closed_at = <Date 2014-01-07.20:53:31.930>
created_at = <Date 2014-01-07.09:38:39.405>
labels = ['type-bug']
title = 'inspect.signature fails on some functions which use Argument Clinic'
updated_at = <Date 2014-01-07.20:53:31.930>
user = 'https://github.com/serhiy-storchaka'

bugs.python.org fields:

activity = <Date 2014-01-07.20:53:31.930>
actor = 'larry'
assignee = 'larry'
closed = True
closed_date = <Date 2014-01-07.20:53:31.930>
closer = 'larry'
components = []
creation = <Date 2014-01-07.09:38:39.405>
creator = 'serhiy.storchaka'
dependencies = []
files = []
hgrepos = []
issue_num = 20161
keywords = []
message_count = 3.0
messages = ['207521', '207522', '207593']
nosy_count = 2.0
nosy_names = ['larry', 'serhiy.storchaka']
pr_nums = []
priority = 'normal'
resolution = 'fixed'
stage = 'resolved'
status = 'closed'
superseder = None
type = 'behavior'
url = 'https://bugs.python.org/issue20161'
versions = ['Python 3.4']

Activity

  1. serhiy-storchaka commented on Jan 7, 2014

    @serhiy-storchaka
    serhiy-storchaka
    on Jan 7, 2014
    MemberAuthor

    inspect.signature fails on some functions which use Argument Clinic. For example after applying bpo-20133 or bpo-20151 it fails for audioop.ratecv and binascii.a2b_qp.

    >>> inspect.signature(audioop.ratecv)
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
  File "/home/serhiy/py/cpython/Lib/inspect.py", line 1468, in signature
    return Signature.from_builtin(obj)
  File "/home/serhiy/py/cpython/Lib/inspect.py", line 1989, in from_builtin
    p(name, default)
  File "/home/serhiy/py/cpython/Lib/inspect.py", line 1982, in p
    default = default.n
AttributeError: type object '_empty' has no attribute 'n'
  2. serhiy-storchaka
    added
    release-blocker
    type-bugAn unexpected behavior, bug, or error
    on Jan 7, 2014

  3. larryhastings commented on Jan 7, 2014

    @larryhastings
    larryhastings
    on Jan 7, 2014
    Contributor

    I already noticed this; it'll be fixed in the patch for bpo-20144. But thanks for the report!

  4. larryhastings commented on Jan 7, 2014

    @larryhastings
    larryhastings
    on Jan 7, 2014
    Contributor

    Fixed as a side effect of fixing bpo-20144. And by the way this was never a release blocker.

  5. larryhastings
    closed this as completedon Jan 7, 2014
  6. larryhastings
    removed
    release-blocker
    on Jan 7, 2014
  7. larryhastings
    self-assigned this
    on Jan 7, 2014
  8. ezio-melotti
    transferred this issue fromon Apr 10, 2022
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