[New-bugs-announce] [issue38337] inspect: getmembers calls properties

Jonas Drotleff report at bugs.python.org
Tue Oct 1 08:01:59 EDT 2019


New submission from Jonas Drotleff <jonas.drotleff at gmail.com>:

When calling inspect.getmembers on a class that has a property (@property), the property will be called by the getattr call in getmembers.

Example:

import inspect

class Example:
    def __init__(self, var):
        self._var = var
        print('__init__')

    def foo(self, bar):
        print(bar)
        print('foo')

    @property
    def var(self):
        print('Access property')
        return self._var


if __name__ == '__main__':
    ex = Example('Hello')
    print('--- getmembers from instance ---')
    print(inspect.getmembers(ex))
    print('--- getmembers from class    ---')
    print(inspect.getmembers(Example))


Result:

__init__
--- getmembers from instance ---
Access property
[('__class__', <attribute '__class__' of 'object' objects>), ..., ('var', 'Hello')]
--- getmembers from class    ---
[('__class__', <attribute '__class__' of 'object' objects>), ..., ('var', <property object at 0x...>)]


Expected:

__init__
--- getmembers from instance ---
[('__class__', <attribute '__class__' of 'object' objects>), ..., ('var', <property object at 0x...>)]
--- getmembers from class    ---
[('__class__', <attribute '__class__' of 'object' objects>), ..., ('var', <property object at 0x...>)]

----------
components: Library (Lib)
messages: 353688
nosy: jnsdrtlf
priority: normal
severity: normal
status: open
title: inspect: getmembers calls properties
type: behavior
versions: Python 3.5, Python 3.6, Python 3.7, Python 3.8, Python 3.9

_______________________________________
Python tracker <report at bugs.python.org>
<https://bugs.python.org/issue38337>
_______________________________________


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