ModuleNotFoundError when using python -mcoverage run

[joren485]

Description

Using python -mcoverage run throws a ModuleNotFoundError error, while using coverage run does not. I use poetry as a dependency and virtual environment manager.

To Reproduce

What version of Python are you using?

$ poetry run python --version
Python 3.8.1

What version of coverage.py are you using?

$ poetry run coverage debug sys
-- sys -------------------------------------------------------
                        version: 5.0.3
                       coverage: /home/joren/.cache/pypoetry/virtualenvs/giphousewebsite-PQqkI1vM-py3.8/lib/python3.8/site-packages/coverage/__init__.py
                         tracer: -none-
                        CTracer: available
           plugins.file_tracers: -none-
            plugins.configurers: -none-
      plugins.context_switchers: -none-
              configs_attempted: .coveragerc
                                 setup.cfg
                                 tox.ini
                                 pyproject.toml
                   configs_read: /tmp/Website/pyproject.toml
                    config_file: None
                config_contents: -none-
                      data_file: -none-
                         python: 3.8.1 (default, Jan  8 2020, 23:09:20) [GCC 9.2.0]
                       platform: Linux-5.4.13-arch1-1-x86_64-with-glibc2.2.5
                 implementation: CPython
                     executable: /home/joren/.cache/pypoetry/virtualenvs/giphousewebsite-PQqkI1vM-py3.8/bin/python
                   def_encoding: utf-8
                    fs_encoding: utf-8
                            pid: 141790
                            cwd: /tmp/Website
                           path: /home/joren/.cache/pypoetry/virtualenvs/giphousewebsite-PQqkI1vM-py3.8/bin
                                 /usr/lib/python38.zip
                                 /usr/lib/python3.8
                                 /usr/lib/python3.8/lib-dynload
                                 /home/joren/.cache/pypoetry/virtualenvs/giphousewebsite-PQqkI1vM-py3.8/lib/python3.8/site-packages
                                 /home/joren/.cache/pypoetry/virtualenvs/giphousewebsite-PQqkI1vM-py3.8/src/django-admin-autocomplete-filter
                    environment: -none-
                   command_line: /home/joren/.cache/pypoetry/virtualenvs/giphousewebsite-PQqkI1vM-py3.8/bin/coverage debug sys
                sqlite3_version: 2.6.0
         sqlite3_sqlite_version: 3.30.1
        sqlite3_compile_options: COMPILER=gcc-9.2.0
                                 ENABLE_COLUMN_METADATA
                                 ENABLE_DBSTAT_VTAB
                                 ENABLE_FTS3
                                 ENABLE_FTS3_TOKENIZER
                                 ENABLE_FTS4
                                 ENABLE_FTS5
                                 ENABLE_JSON1
                                 ENABLE_RTREE
                                 ENABLE_UNLOCK_NOTIFY
                                 HAVE_ISNAN
                                 MAX_EXPR_DEPTH=10000
                                 MAX_VARIABLE_NUMBER=250000
                                 SECURE_DELETE
                                 TEMP_STORE=1
                                 THREADSAFE=1

What versions of what packages do you have installed?

$ poetry run pip freeze
appdirs==1.4.3
asgiref==3.2.3
attrs==19.3.0
beautifulsoup4==4.8.2
black==19.10b0
certifi==2019.11.28
chardet==3.0.4
Click==7.0
coverage==5.0.3
Django==3.0.2
-e git+https://github.com/farhan0581/django-admin-autocomplete-filter.git@2f4f80bfca31426faf1b7dab3f8366296f4fe67e#egg=django_admin_autocomplete_filter
django-appconf==1.0.3
django-bootstrap4==1.1.1
django-compressor==2.4
django-sass-processor==0.8
entrypoints==0.3
Faker==4.0.0
flake8==3.7.9
flake8-import-order==0.18.1
freezegun==0.3.14
idna==2.8
libsass==0.19.4
mccabe==0.6.1
pathspec==0.7.0
Pillow==7.0.0
pycodestyle==2.5.0
pydocstyle==5.0.2
pyflakes==2.1.1
python-dateutil==2.8.1
pytz==2019.3
rcssmin==1.0.6
regex==2020.1.8
requests==2.22.0
rjsmin==1.1.0
six==1.14.0
snowballstemmer==2.0.0
soupsieve==1.9.5
sqlparse==0.3.0
text-unidecode==1.3
toml==0.10.0
typed-ast==1.4.1
urllib3==1.25.8

What code are you running?
The master branch of GipHouse/Website.

What commands did you run?
The following steps show how to reproduce the problem.

$ cd /tmp/
$ git clone https://github.com/GipHouse/Website.git
...
$ cd Website
$ poetry install
...
$ poetry run coverage run website/manage.py test
Creating test database for alias 'default'...
System check identified no issues (0 silenced).
...........................................................................................................................................
----------------------------------------------------------------------
Ran 139 tests in 3.484s

OK
Destroying test database for alias 'default'...
$ poetry run python -mcoverage run website/manage.py test
Traceback (most recent call last):
  File "website/manage.py", line 15, in <module>
    execute_from_command_line(sys.argv)
  File "/home/joren/.cache/pypoetry/virtualenvs/giphousewebsite-PQqkI1vM-py3.8/lib/python3.8/site-packages/django/core/management/__init__.py", line 401, in execute_from_command_line
    utility.execute()
  File "/home/joren/.cache/pypoetry/virtualenvs/giphousewebsite-PQqkI1vM-py3.8/lib/python3.8/site-packages/django/core/management/__init__.py", line 395, in execute
    self.fetch_command(subcommand).run_from_argv(self.argv)
  File "/home/joren/.cache/pypoetry/virtualenvs/giphousewebsite-PQqkI1vM-py3.8/lib/python3.8/site-packages/django/core/management/commands/test.py", line 23, in run_from_argv
    super().run_from_argv(argv)
  File "/home/joren/.cache/pypoetry/virtualenvs/giphousewebsite-PQqkI1vM-py3.8/lib/python3.8/site-packages/django/core/management/base.py", line 320, in run_from_argv
    parser = self.create_parser(argv[0], argv[1])
  File "/home/joren/.cache/pypoetry/virtualenvs/giphousewebsite-PQqkI1vM-py3.8/lib/python3.8/site-packages/django/core/management/base.py", line 294, in create_parser
    self.add_arguments(parser)
  File "/home/joren/.cache/pypoetry/virtualenvs/giphousewebsite-PQqkI1vM-py3.8/lib/python3.8/site-packages/django/core/management/commands/test.py", line 44, in add_arguments
    test_runner_class = get_runner(settings, self.test_runner)
  File "/home/joren/.cache/pypoetry/virtualenvs/giphousewebsite-PQqkI1vM-py3.8/lib/python3.8/site-packages/django/test/utils.py", line 301, in get_runner
    test_runner_class = test_runner_class or settings.TEST_RUNNER
  File "/home/joren/.cache/pypoetry/virtualenvs/giphousewebsite-PQqkI1vM-py3.8/lib/python3.8/site-packages/django/conf/__init__.py", line 76, in __getattr__
    self._setup(name)
  File "/home/joren/.cache/pypoetry/virtualenvs/giphousewebsite-PQqkI1vM-py3.8/lib/python3.8/site-packages/django/conf/__init__.py", line 63, in _setup
    self._wrapped = Settings(settings_module)
  File "/home/joren/.cache/pypoetry/virtualenvs/giphousewebsite-PQqkI1vM-py3.8/lib/python3.8/site-packages/django/conf/__init__.py", line 142, in __init__
    mod = importlib.import_module(self.SETTINGS_MODULE)
  File "/usr/lib/python3.8/importlib/__init__.py", line 127, in import_module
    return _bootstrap._gcd_import(name[level:], package, level)
  File "<frozen importlib._bootstrap>", line 1014, in _gcd_import
  File "<frozen importlib._bootstrap>", line 991, in _find_and_load
  File "<frozen importlib._bootstrap>", line 961, in _find_and_load_unlocked
  File "<frozen importlib._bootstrap>", line 219, in _call_with_frames_removed
  File "<frozen importlib._bootstrap>", line 1014, in _gcd_import
  File "<frozen importlib._bootstrap>", line 991, in _find_and_load
  File "<frozen importlib._bootstrap>", line 961, in _find_and_load_unlocked
  File "<frozen importlib._bootstrap>", line 219, in _call_with_frames_removed
  File "<frozen importlib._bootstrap>", line 1014, in _gcd_import
  File "<frozen importlib._bootstrap>", line 991, in _find_and_load
  File "<frozen importlib._bootstrap>", line 973, in _find_and_load_unlocked
ModuleNotFoundError: No module named 'giphousewebsite'

Expected Behavior

python -mcoverage run and coverage run should both succeed and have the same output.

Additional Context

I noticed a similar problem in #862, but that issue was fixed in 5.0.3 (which I am using).

[joren485]

The problem turned out to be a __init__.py file in the root directory of the Django project.