New submission from Allan Feldman <[email protected]>:
Python 3.7 made several performance improvements to the namedtuple class as
part of https://bugs.python.org/issue28638
Prior to the implementation of bpo-28638, the __module__ attribute for a
namedtuple's methods (e.g. _asdict) would return the value 'namedtuple_%s' %
typename (e.g. namedtuple_Point).
Due to the optimizations made, the __module__ attribute for a namedtuple's
methods now returns 'collections'.
The proposed change as part of this issue is to report the more accurate
derived module name for the namedtuple methods. Updating the __module__
attribute should help debug and introspection tools more accurately report the
details of executing calls (in profilers for example).
Example from Python 3.6:
>>> from collections import namedtuple
>>> Point = namedtuple('Point', ('x', 'y'))
>>> p1 = Point(1,2)
>>> p1._asdict.__module__
'namedtuple_Point'
Example from Python 3.7.0b3:
>>> from collections import namedtuple
>>> Point = namedtuple('Point', ('x', 'y'))
>>> p1 = Point(1,2)
>>> p1._asdict.__module__
'collections'
Desired behavior:
>>> from collections import namedtuple
>>> Point = namedtuple('Point', ('x', 'y'))
>>> p1 = Point(1,2)
>>> p1._asdict.__module__
'__main__'
----------
components: Library (Lib)
messages: 315869
nosy: a-feld, rhettinger
priority: normal
severity: normal
status: open
title: Update module attribute on namedtuple methods for introspection.
type: enhancement
versions: Python 3.7, Python 3.8
_______________________________________
Python tracker <[email protected]>
<https://bugs.python.org/issue33380>
_______________________________________
_______________________________________________
Python-bugs-list mailing list
Unsubscribe:
https://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
