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importlib_metadata is not Python 2 compatible.

See original GitHub issue

We’ve been getting the following error when trying to use celery 4.3.0 (kombu 4.6.4):

File "/usr/local/lib/python2.7/dist-packages/celery/local.py", line 509, in __getattr__
    module = __import__(self._object_origins[name], None, None, [name])
  File "/usr/local/lib/python2.7/dist-packages/celery/app/__init__.py", line 5, in <module>
    from celery import _state
  File "/usr/local/lib/python2.7/dist-packages/celery/_state.py", line 17, in <module>
    from celery.utils.threads import LocalStack
  File "/usr/local/lib/python2.7/dist-packages/celery/utils/__init__.py", line 8, in <module>
    from .functional import memoize  # noqa
  File "/usr/local/lib/python2.7/dist-packages/celery/utils/functional.py", line 10, in <module>
    from kombu.utils.functional import (LRUCache, dictfilter, is_list, lazy,
  File "/usr/local/lib/python2.7/dist-packages/kombu/utils/__init__.py", line 5, in <module>
    from .compat import fileno, maybe_fileno, nested, register_after_fork
  File "/usr/local/lib/python2.7/dist-packages/kombu/utils/compat.py", line 10, in <module>
    import importlib_metadata
  File "/usr/local/lib/python2.7/dist-packages/importlib_metadata/__init__.py", line 9, in <module>
    import zipp
  File "/usr/local/lib/python2.7/dist-packages/zipp.py", line 12, in <module>
    import more_itertools
  File "/usr/local/lib/python2.7/dist-packages/more_itertools/__init__.py", line 1, in <module>
    from more_itertools.more import *  # noqa
  File "/usr/local/lib/python2.7/dist-packages/more_itertools/more.py", line 340
    def _collate(*iterables, key=lambda a: a, reverse=False):
                               ^
SyntaxError: invalid syntax

The changelog mentions that importlib_metadata (mentioned in the traceback) was added in kombu 4.6.4.

Use importlib-metadata instead of pkg_resources for better performance

Pinning to kombu 4.6.3 seems to fix the problem for me.

Issue Analytics

State:
Created 4 years ago
Comments:6 (5 by maintainers)

Top GitHub Comments

2reactions

davidszottencommented, Sep 4, 2019

i wonder if this is similar to https://github.com/jaraco/zipp/issues/14

could you try (in a fresh virtualenv) to first upgrade pip (pip install -U pip) and then installing kombu again? (you need a new enough pip that knows to only install versions of packages that still have py2 support)

0reactions

auvipycommented, Sep 6, 2019

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