[Python] mypy complains about a missing optional module

I have a module (let's name it optional_module) that I want to be imported optionally, as it can be either present or absent. Now I do it this simple way:

try:
import optional_module

except ImportError:
... # Working around the module

else:
... # Using the module


But mypy gives an error in case when optional_module is missing:

main.py:2: error: Cannot find implementation or library stub for module named
"optional_module" [import-not-found]
import optional_module
^
main.py:2: note: See https://mypy.readthedocs.io/en/stable/running_mypy.html#missing-imports


Yes, I looked at the link proposed by mypy, but it didn't help me to find the answer.

Of course, I could simply remove this check adding "# type: ignore" after the import line, but it would also suppress all useful checks of the module content in case when it does exist. So it's too rude.

Is there a more delicate and correct way to make mypy stop worrying and love my conditional import?

P.S. Here are my mypy configuration flags:

[mypy]
disallow_untyped_defs = True
check_untyped_defs = True
disallow_any_unimported = True
warn_return_any = True
warn_unreachable = True
warn_redundant_casts = True
warn_unused_ignores = True
pretty = True

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