python - How do I type hint values extracted from a type agnostic container?

Question

I have a container class that can contain whatever value type is inserted into it. Now I have the following situation:

def foo(val: str)
    print(str)

container.add('string')
value = container.get_first()
foo(value)  # Static type checker complains here

I know with certainty that the value coming out of container will be a string, but as far as the type checker is concerned, this value is unknown, and it has problems with me passing it to foo(), which takes a string.

I can't typehint container because it's imported from a third party library. How do I tell the type checker that it's OK to assume a string?

question from:https://stackoverflow.com/questions/66050626/how-do-i-type-hint-values-extracted-from-a-type-agnostic-container

Answer 1

Waitting for answers