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Comment by parhamn

18 hours ago

Whats the expected error in the example you gave? That x can't be none because it was received as a str?

isn't it perfectly valid to pass None to that function ? It's not like python enforces types at runtime nor at compile time. Right ?

  • Sure, it's valid python to do that. By that logic you could also pass an int. But the context of this post is that you're using a static type checker.

  • It's not valid from a typing perspective, but python will let you. If you want to disregard types though then none of this matters anyway and you won't get much benefit from these tools