MyPy complains about "has no attribute" when adding new method to instance

Asked Dec 02 '21 at 12:40

Active Dec 04 '21 at 07:29

Viewed 811 times

my_object = instance_from_external_module
my_object.prop = 2  # "..." has no attribute "prop"

How can I make MyPy accept a monkeypatch without raising an error in every single file of a large project where the object and that property are used?

I can't subclass whatever class the object is an instance of, because the object is complex and goes through a lot of third-party processing before being called.

edited Dec 04 '21 at 07:29

Laurent

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asked Dec 02 '21 at 12:40

Some Guy

HI, does this help? https://stackoverflow.com/a/51191130/11246056 – Laurent Dec 04 '21 at 07:29
No, because as I said I can't subclass my_object. It's an instance I import from an external module. – Some Guy Dec 04 '21 at 17:46

MyPy complains about "has no attribute" when adding new method to instance

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