[New-bugs-announce] [issue38840] incorrect __all__ list in multiprocessing.managers module

[Xavier de Gaye]

New submission from Xavier de Gaye <xdegaye at gmail.com>:

On android which is a platform that is missing the shared memory implementation, test___all__ fails because 'multiprocessing.managers' has no attribute 'SharedMemoryManager' which is listed in __all__.


2|generic_x86_64:/data/local/tmp/python $ python
Python 3.9.0a0 (heads/abifa-dirty:cf805c25e6, Nov 18 2019, 16:40:26) 
[Clang 8.0.2 (https://android.googlesource.com/toolchain/clang 40173bab62ec7462 on linux
Type "help", "copyright", "credits" or "license" for more information.
>>> import multiprocessing.shared_memory
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
  File "/data/local/tmp/python/lib/python3.9/multiprocessing/shared_memory.py", line 22, in <module>
    import _posixshmem
ModuleNotFoundError: No module named '_posixshmem'
>>> 


2|generic_x86_64:/data/local/tmp/python $ python -m test test___all__
0:00:00 Run tests sequentially
0:00:00 [1/1] test___all__
test test___all__ failed -- Traceback (most recent call last):
  File "/data/local/tmp/python/lib/python3.9/test/test___all__.py", line 38, in check_all
    exec("from %s import *" % modname, names)
AttributeError: module 'multiprocessing.managers' has no attribute 'SharedMemoryManager'

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "/data/local/tmp/python/lib/python3.9/test/test___all__.py", line 41, in check_all
    self.fail("__all__ failure in {}: {}: {}".format(
AssertionError: __all__ failure in multiprocessing.managers: AttributeError: module 'multiprocessing.managers' has no attribute 'SharedMemoryManager'

test___all__ failed

== Tests result: FAILURE ==

1 test failed:
    test___all__

Total duration: 1.8 sec
Tests result: FAILURE

----------
components: Library (Lib)
messages: 356922
nosy: xdegaye
priority: normal
severity: normal
stage: needs patch
status: open
title: incorrect __all__ list in multiprocessing.managers module
type: behavior
versions: Python 3.9

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Python tracker <report at bugs.python.org>
<https://bugs.python.org/issue38840>
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