Incompatible default for argument "cfg_path" (default has type "None", argument has type "Path")

[Krishna2709]

• While running tox the mypy classification_model checks fail.
• Error:

test_package: OK ✔ in 3.99 seconds
checks: commands[0]> flake8 classification_model tests
checks: commands[1]> isort classification_model tests
Fixing C:\Users\krish\titanicSurvival\production-model-package\classification_model\pipeline.py
checks: commands[2]> black classification_model tests
checks: commands[3]> mypy classification_model
classification_model\config\core.py: note: In function "fetch_config_from_yaml":
classification_model\config\core.py:57: error: Incompatible default for argument "cfg_path" (default has type "None", argument has type "Path")  [assignment]
classification_model\config\core.py:57: note: PEP 484 prohibits implicit Optional. Accordingly, mypy has changed its default to no_implicit_optional=True
classification_model\config\core.py:57: note: Use https://github.com/hauntsaninja/no_implicit_optional to automatically upgrade your codebase
Found 1 error in 1 file (checked 12 source files)
checks: exit 1 (0.50 seconds) C:\Users\krish\titanicSurvival\production-model-package> mypy classification_model pid=28348
  test_package: OK (3.99=setup[0.06]+cmd[1.76,2.16] seconds)
  checks: FAIL code 1 (2.26=setup[0.04]+cmd[0.86,0.28,0.58,0.50] seconds)
  evaluation failed :( (6.78 seconds)

• Update the [testenv:checks] in tox.ini as following:

[testenv:checks]
envdir = {toxworkdir}/checks
deps =
	-r{toxinidir}/requirements/typing_requirements.txt
commands =
	flake8 classification_model tests
	isort classification_model tests
	black classification_model tests
	{posargs:mypy classification_model --implicit-optional}

• Note that we added --implicit-optional in the last command: posargs
• Results:

checks: commands[3]> mypy classification_model --implicit-optional
Success: no issues found in 12 source files
  test_package: OK (3.81=setup[0.09]+cmd[1.72,2.00] seconds)
  checks: OK (3.25=setup[0.02]+cmd[0.81,0.27,0.58,1.58] seconds)
  congratulations :) (7.66 seconds)

[ferygood]

Thanks @Krishna2709 ! I face the same error and the command --implicit-optional help mypy to pass the type-checking to optional variables which may be missing or have inconsistent types.