python setup.py test fails to install pytest

[skolsuper]

Environment is python3.5.1 virtualenv on macOSX. However I have the same issue when running in the python:3.5 docker container, which is where the output I include below comes from.

I am trying to test a django project using the pytest-django plugin and the pytest-runner package for running from setup.py.

This is the relevant part of my setup.py:

setup(
    ...
    setup_requires=[
        'pytest-runner',
    ],
    tests_require=[
        'pytest',
        'pytest-django',
    ],
)

Running python setup.py test results in the following output:

Installed /tmp/easy_install-vzn90ojy/pytest-runner-2.8/.eggs/setuptools_scm-1.11.1-py3.5.egg
zip_safe flag not set; analyzing archive contents...

Installed /usr/webapps/my_app/.eggs/pytest_runner-2.8-py3.5.egg
running pytest
Searching for pytest-django
Reading https://pypi.python.org/simple/pytest-django/
Best match: pytest-django 2.9.1
Downloading https://pypi.python.org/packages/50/6d/77a4644d15746ed2a243ed557af693cec7887e43b357919ba0b4fd029518/pytest-django-2.9.1.tar.gz#md5=3c9dde85e99ec409df209a62b4715e1a
Processing pytest-django-2.9.1.tar.gz
Writing /tmp/easy_install-ppvg7rkt/pytest-django-2.9.1/setup.cfg
Running pytest-django-2.9.1/setup.py -q bdist_egg --dist-dir /tmp/easy_install-ppvg7rkt/pytest-django-2.9.1/egg-dist-tmp-uzcpfwy8

Installed /tmp/easy_install-ppvg7rkt/pytest-django-2.9.1/.eggs/setuptools_scm-1.8.0-py3.5.egg
warning: no previously-included files matching '*' found under directory 'pytest_django_test'
warning: no previously-included files matching '*' found under directory 'tests'
warning: no previously-included files matching '*' found under directory '.tox'
warning: no previously-included files matching '*' found under directory 'bin'
warning: no previously-included files matching '*' found under directory 'src'
warning: no previously-included files matching '*' found under directory '.git'
warning: no previously-included files matching '*' found under directory 'bin'
warning: no previously-included files matching '*' found under directory 'include'
warning: no previously-included files matching '*' found under directory 'lib'
warning: no previously-included files matching '*' found under directory 'share'
warning: no previously-included files matching '*' found under directory 'src'
zip_safe flag not set; analyzing archive contents...
pytest_django.__pycache__.plugin.cpython-35: module MAY be using inspect.stack
creating /usr/webapps/my_app/.eggs/pytest_django-2.9.1-py3.5.egg
Extracting pytest_django-2.9.1-py3.5.egg to /usr/webapps/my_app/.eggs

Installed /usr/webapps/my_app/.eggs/pytest_django-2.9.1-py3.5.egg
Searching for pytest
Best match: pytest django-2.9.1
Downloading https://pypi.python.org/packages/50/6d/77a4644d15746ed2a243ed557af693cec7887e43b357919ba0b4fd029518/pytest-django-2.9.1.tar.gz#md5=3c9dde85e99ec409df209a62b4715e1a
Processing pytest-django-2.9.1.tar.gz
Writing /tmp/easy_install-vl_5dvii/pytest-django-2.9.1/setup.cfg
Running pytest-django-2.9.1/setup.py -q bdist_egg --dist-dir /tmp/easy_install-vl_5dvii/pytest-django-2.9.1/egg-dist-tmp-w82jm2cu

Installed /tmp/easy_install-vl_5dvii/pytest-django-2.9.1/.eggs/setuptools_scm-1.8.0-py3.5.egg
warning: no previously-included files matching '*' found under directory 'pytest_django_test'
warning: no previously-included files matching '*' found under directory 'tests'
warning: no previously-included files matching '*' found under directory '.tox'
warning: no previously-included files matching '*' found under directory 'bin'
warning: no previously-included files matching '*' found under directory 'src'
warning: no previously-included files matching '*' found under directory '.git'
warning: no previously-included files matching '*' found under directory 'bin'
warning: no previously-included files matching '*' found under directory 'include'
warning: no previously-included files matching '*' found under directory 'lib'
warning: no previously-included files matching '*' found under directory 'share'
warning: no previously-included files matching '*' found under directory 'src'
zip_safe flag not set; analyzing archive contents...
pytest_django.__pycache__.plugin.cpython-35: module MAY be using inspect.stack
removing '/usr/webapps/my_app/.eggs/pytest_django-2.9.1-py3.5.egg' (and everything under it)
creating /usr/webapps/my_app/.eggs/pytest_django-2.9.1-py3.5.egg
Extracting pytest_django-2.9.1-py3.5.egg to /usr/webapps/my_app/.eggs

Installed /usr/webapps/my_app/.eggs/pytest_django-2.9.1-py3.5.egg
Traceback (most recent call last):
  File "setup.py", line 27, in <module>
    tests_require=test_requirements,
  File "/usr/local/lib/python3.5/distutils/core.py", line 148, in setup
    dist.run_commands()
  File "/usr/local/lib/python3.5/distutils/dist.py", line 955, in run_commands
    self.run_command(cmd)
  File "/usr/local/lib/python3.5/distutils/dist.py", line 974, in run_command
    cmd_obj.run()
  File "/usr/webapps/my_app/.eggs/pytest_runner-2.8-py3.5.egg/ptr.py", line 73, in run
  File "/usr/local/lib/python3.5/site-packages/setuptools/dist.py", line 313, in fetch_build_eggs
    replace_conflicting=True,
  File "/usr/local/lib/python3.5/site-packages/pkg_resources/__init__.py", line 839, in resolve
    raise DistributionNotFound(req, requirers)
pkg_resources.DistributionNotFound: The 'pytest' distribution was not found and is required by the application

Notice that the installer first installs pytest django, then installs it again instead of pytest:

Searching for pytest-django
Reading https://pypi.python.org/simple/pytest-django/
Best match: pytest-django 2.9.1
...
Searching for pytest
Best match: pytest django-2.9.1
Downloading 

Not sure if this is an issue with pytest, pytest-django, pytest-runner, setuptools or something else, so feel free to close this and point me to the right place to make an issue.

[skolsuper]

Incidentally, while typing this up, I fixed the issue by pinning pytest==2.9.2 in test_requirements.

[RonnyPfannschmidt]

Looks like setuptools

[RonnyPfannschmidt]

closing this one a setuptools issue

[astrojuanlu]

I was bitten by this today. Do you know which setuptools bug is this, and whether it was fixed?

[astrojuanlu]

Self answer pypa/setuptools#196

[RonnyPfannschmidt]

@Juanlu001 thanks for finding the reference