setuptools: ImportWarning when importing a PEP 420 namespace package

The pkg_resources code is raising an ImportWarning when it attempts to import a PEP 420 implicit namespace package:

ImportError: Failed to import test module: test.test_methods
Traceback (most recent call last):
  File "/usr/lib/python3.5/unittest/loader.py", line 428, in _find_test_path
    module = self._get_module_from_name(name)
  File "/usr/lib/python3.5/unittest/loader.py", line 369, in _get_module_from_name
    __import__(name)
  File "/home/bignose/Projects/debian/dput/trunk/test/test_methods.py", line 26, in <module>
    import testscenarios
  File "/usr/lib/python3/dist-packages/testscenarios/__init__.py", line 57, in <module>
    from testscenarios.scenarios import (
  File "/usr/lib/python3/dist-packages/testscenarios/scenarios.py", line 34, in <module>
    from testtools import iterate_tests
  File "/usr/lib/python3/dist-packages/testtools/__init__.py", line 124, in <module>
    from pbr.version import VersionInfo
  File "/usr/lib/python3/dist-packages/pbr/version.py", line 25, in <module>
    import pkg_resources
  File "/usr/lib/python3/dist-packages/pkg_resources/__init__.py", line 3037, in <module>
    @_call_aside
  File "/usr/lib/python3/dist-packages/pkg_resources/__init__.py", line 3021, in _call_aside
    f(*args, **kwargs)
  File "/usr/lib/python3/dist-packages/pkg_resources/__init__.py", line 3065, in _initialize_master_working_set
    for dist in working_set
  File "/usr/lib/python3/dist-packages/pkg_resources/__init__.py", line 3065, in <genexpr>
    for dist in working_set
  File "/usr/lib/python3/dist-packages/pkg_resources/__init__.py", line 2595, in activate
    declare_namespace(pkg)
  File "/usr/lib/python3/dist-packages/pkg_resources/__init__.py", line 2163, in declare_namespace
    _handle_ns(packageName, path_item)
  File "/usr/lib/python3/dist-packages/pkg_resources/__init__.py", line 2083, in _handle_ns
    loader = importer.find_module(packageName)
  File "<frozen importlib._bootstrap_external>", line 445, in _find_module_shim
ImportWarning: Not importing directory /usr/lib/python3/dist-packages/keyrings: missing __init__

(To reproduce this, enable the -W error option to python3. I did this to try to catch warnings in my code, assuming that libraries would not cause them 😕)

The “Not importing directory […] missing init” contradicts the explicit specification from PEP 420:

Namespace packages [as specified in this PEP] cannot contain an init.py .

About this issue

Original URL
State: closed
Created 7 years ago
Reactions: 1
Comments: 19 (13 by maintainers)

Commits related to this issue

Resolve warning filter issues There's an issue with 'pkgutils' and namespace packages. This has been reported against setuptools [1], but until this is resolved, we simply need to live with it. Ensur... — committed to stephenfin/sphinx by stephenfin 7 years ago
Resolve warning filter issues There's an issue with 'pkgutils' and namespace packages. This has been reported against setuptools [1], but until this is resolved, we simply need to live with it. Ensur... — committed to stephenfin/sphinx by stephenfin 7 years ago
Resolve warning filter issues There's an issue with 'pkgutils' and namespace packages. This has been reported against setuptools [1], but until this is resolved, we simply need to live with it. Ensur... — committed to stephenfin/sphinx by stephenfin 7 years ago
Resolve warning filter issues There's an issue with 'pkgutils' and namespace packages. This has been reported against setuptools [1], but until this is resolved, we simply need to live with it. Ensur... — committed to stephenfin/sphinx by stephenfin 7 years ago
Resolve warning filter issues There's an issue with 'pkgutils' and namespace packages. This has been reported against setuptools [1], but until this is resolved, we simply need to live with it. Ensur... — committed to stephenfin/sphinx by stephenfin 7 years ago
Resolve warning filter issues There's an issue with 'pkgutils' and namespace packages. This has been reported against setuptools [1], but until this is resolved, we simply need to live with it. Ensur... — committed to stephenfin/sphinx by stephenfin 7 years ago
Resolve warning filter issues There's an issue with 'pkgutils' and namespace packages. This has been reported against setuptools [1], but until this is resolved, we simply need to live with it. Ensur... — committed to stephenfin/sphinx by stephenfin 7 years ago
Resolve warning filter issues There's an issue with 'pkgutils' and namespace packages. This has been reported against setuptools [1], but until this is resolved, we simply need to live with it. Ensur... — committed to stephenfin/sphinx by stephenfin 7 years ago
Ignore ruamel import warnings The warnings are caused by pyfiglet importing pkg_resources. There's an issue about it here pypa/setuptools#1111. — committed to orlnub123/ASCII-ify by orlnub123 6 years ago
Suppress warnings in importer.find_module. Fixes #1111. — committed to pypa/setuptools by jaraco 6 years ago
Suppress warnings in importer.find_module. Fixes #1111. — committed to pypa/setuptools by jaraco 6 years ago

Most upvoted comments

I’m seeing this as well. It is causing loads of noise in my logs when Python warnings are enabled. Here is a minimal bash script to demonstrate the error:

#!/bin/bash

rm -rf venv
python3 -m venv venv
venv/bin/pip install sphinxcontrib-websupport
venv/bin/python -Werror -c 'import pkg_resources'

Actual output:

Traceback (most recent call last):
  File "<string>", line 1, in <module>
  File "/home/jon/warning-test/venv/lib64/python3.5/site-packages/pkg_resources/__init__.py", line 2958, in <module>
    @_call_aside
  File "/home/jon/warning-test/venv/lib64/python3.5/site-packages/pkg_resources/__init__.py", line 2944, in _call_aside
    f(*args, **kwargs)
  File "/home/jon/warning-test/venv/lib64/python3.5/site-packages/pkg_resources/__init__.py", line 2985, in _initialize_master_working_set
    dist.activate(replace=False)
  File "/home/jon/warning-test/venv/lib64/python3.5/site-packages/pkg_resources/__init__.py", line 2521, in activate
    declare_namespace(pkg)
  File "/home/jon/warning-test/venv/lib64/python3.5/site-packages/pkg_resources/__init__.py", line 2103, in declare_namespace
    _handle_ns(packageName, path_item)
  File "/home/jon/warning-test/venv/lib64/python3.5/site-packages/pkg_resources/__init__.py", line 2037, in _handle_ns
    loader = importer.find_module(packageName)
  File "<frozen importlib._bootstrap_external>", line 445, in _find_module_shim
ImportWarning: Not importing directory /home/jon/warning-test/venv/lib64/python3.5/site-packages/sphinxcontrib: missing __init__

jdufresne on Aug 1, 2017

I tried replicating the issue on Python 3.6 but couldn’t

Glad I pasted my exact commands, because I started replicating it on my local workstation and couldn’t figure out what I’d done wrong. I see now I neglected to include the important -W error when I tried to replicate the issue above.

jaraco on Sep 14, 2018

Not sure if this will be of any help but the warning seems to occur on any namespace packages present in sys.modules that have a “namespace_packages.txt” file in their metadata.

orlnub123 on Sep 14, 2018