tox 4.0.15: ImportError: cannot import name 'DepConfig' from 'tox.config'

[wookayin]

Issue

ImportError: cannot import name 'DepConfig' from 'tox.config' upon running tox

Environment

Provide at least:

• OS: macOS
• pip list of the host Python where tox is installed:

tox == 4.0.15

Output of running tox

Provide the output of tox -rvv:

Traceback (most recent call last):
  File "/Users/wookayin/.miniforge3/envs/py311/bin/tox", line 8, in <module>
    sys.exit(run())
             ^^^^^
  File "/Users/wookayin/.miniforge3/envs/py311/lib/python3.11/site-packages/tox/run.py", line 19, in run
    result = main(sys.argv[1:] if args is None else args)
             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/Users/wookayin/.miniforge3/envs/py311/lib/python3.11/site-packages/tox/run.py", line 38, in main
    state = setup_state(args)
            ^^^^^^^^^^^^^^^^^
  File "/Users/wookayin/.miniforge3/envs/py311/lib/python3.11/site-packages/tox/run.py", line 53, in setup_state
    options = get_options(*args)
              ^^^^^^^^^^^^^^^^^^
  File "/Users/wookayin/.miniforge3/envs/py311/lib/python3.11/site-packages/tox/config/cli/parse.py", line 38, in get_options
    guess_verbosity, log_handler, source = _get_base(args)
                                           ^^^^^^^^^^^^^^^
  File "/Users/wookayin/.miniforge3/envs/py311/lib/python3.11/site-packages/tox/config/cli/parse.py", line 61, in _get_base
    MANAGER.load_plugins(source.path)
  File "/Users/wookayin/.miniforge3/envs/py311/lib/python3.11/site-packages/tox/plugin/manager.py", line 90, in load_plugins
    self._register_plugins(inline)
  File "/Users/wookayin/.miniforge3/envs/py311/lib/python3.11/site-packages/tox/plugin/manager.py", line 38, in _register_plugins
    self.manager.load_setuptools_entrypoints(NAME)
  File "/Users/wookayin/.miniforge3/envs/py311/lib/python3.11/site-packages/pluggy/_manager.py", line 287, in load_setuptools_entrypoints
    plugin = ep.load()
             ^^^^^^^^^
  File "/Users/wookayin/.miniforge3/envs/py311/lib/python3.11/importlib/metadata/__init__.py", line 198, in load
    module = import_module(match.group('module'))
             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/Users/wookayin/.miniforge3/envs/py311/lib/python3.11/importlib/__init__.py", line 126, in import_module
    return _bootstrap._gcd_import(name[level:], package, level)
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "<frozen importlib._bootstrap>", line 1206, in _gcd_import
  File "<frozen importlib._bootstrap>", line 1178, in _find_and_load
  File "<frozen importlib._bootstrap>", line 1149, in _find_and_load_unlocked
  File "<frozen importlib._bootstrap>", line 690, in _load_unlocked
  File "<frozen importlib._bootstrap_external>", line 940, in exec_module
  File "<frozen importlib._bootstrap>", line 241, in _call_with_frames_removed
  File "/Users/wookayin/.miniforge3/envs/py311/lib/python3.11/site-packages/testmon/tox_testmon.py", line 6, in <module>
    from tox.config import DepConfig
ImportError: cannot import name 'DepConfig' from 'tox.config' (/Users/wookayin/.miniforge3/envs/py311/lib/python3.11/site-packages/tox/config/__init__.py)

Minimal example

If possible, provide a minimal reproducer for the issue:

# tox.ini
[tox]
env_list =
    py310
    py39
    py38
    py37

$ tox

[wookayin]

Seems this happens with tox >= 4.0; it's OK with tox < 4.0. Was DepConfig deprecated or removed?

Seems this is a problem of pytest-testmon (installed: 1.4.2) that is not compatible with tox 4.x. Removing pytest-testmon resolves the issue temporarily.

[gaborbernat]

Yes this is not a thing with tox 4.