Way to disable missing library stubs errors

[csm10495]

Feature

I understand that generally we want to use stubs and type annotations, but sometimes we're in an environment where:

• I can't install new packages at check time (maybe air-gapped to network)
• I don't have the stubs available

Requesting a command line and config option to disable errors/warnings relating to inability to find/use stubs for the entire project.

Lets call this option ignore_missing_stubs it defaults to False.

Pitch

This should be combinable and usable at a global level to disable errors relating to inability to use type stubs for known libraries.

A user can use this option combined with ignore_missing_imports = True to disable all [import-untyped] errors globally for the project.

In other words:

[mypy]
ignore_missing_imports = True
ignore_missing_stubs = True

Would lead to no errors on missing both missing imports and no errors on missing stubs for known packages.

I completely understand that this is counter to how we want mypy to be used, but honestly the current nagging for import-untyped is a bit overboard for me. At the moment disabling the stub error without listing out all libs, and disabling it manually and/or adding type ignores to each import line seems to be the only way.

[hauntsaninja]

--disable-error-code import-untyped should work