Use all python keywords when checking if prop name is valid

[rmarren1]

Solves #361

Previously, we did not allow a prop name to be written as a keyword argument in a Python Component class if it was in keyword.kwlist. Since keyword.kwlist is version specific, class files were dependent on the Python version used to create them.

This PR removes this problem, Python Component class files built with any of our supported versions (2.7, 3.3, 3.4, 3.5, 3.6, 3.7) should work for all the other ones too.

Note that these props are still usable, they are just passed through **kwargs rather than a proper keyword argument, so IDEs will not autocomplete for these props. async in html.Script is the only component in the core libraries affected by this so far.

[T4rk1n]

I thought those tests failures were resolved by 9e3ca4d. Or are they new failures ?

[rmarren1]

I'm not really sure, been trying to figure it out. I'm not getting those errors locally

[rmarren1]

Locally I get this... strange

======================================================================
FAIL: test_serving_scripts (tests.test_react.IntegrationTest)
----------------------------------------------------------------------
Traceback (most recent call last):
  File "/home/ryan/Plotly/dash/tests/test_react.py", line 331, in test_serving_scripts
    self.assertEqual(response.status_code, 200)
AssertionError: 404 != 200

----------------------------------------------------------------------

[T4rk1n]

Fails for me too, that file is not tested on ci, maybe it's old ?

[rmarren1]

Oh ok I'm using nose2 so it picked up that file. Looks like an old un-used test that was broken by a recent PR. Without it everything else works.

[T4rk1n]

Try locking dash_core_components==0.35.1.

[rmarren1]

Cool. Looks like dcc==0.37.0 was breaking

[T4rk1n]

Yes, there is this bug plotly/dash-core-components#362, thought it was fixed in plotly/dash-core-components#356 but I guess it just made it worse. I have a test that fails in the conditions, I tried on one version of the commits and it passed. but after merge it failed again.

https://circleci.com/gh/plotly/dash-core-components/2022?utm_campaign=vcs-integration-link&utm_medium=referral&utm_source=github-build-link

[T4rk1n]

💃 I think we need those Input integration test in the dcc repo instead of here so the failures happens there instead.