Pyright doesn't throw errors if I try to use a class method that doesn't exist

[kappa90]

Take this code example:

sourceset, ready_sourceitems = SourceManagerUtils.remove_boilerplate(
                sourceset,
                ready_sourceitems[:10],
            )

If remove_boilerplate hasn't been implemented yet, Mypy will throw an error, while Pylance/pyright won't.

I haven't found a way to enforce this behavior, but it would be critical since I'm refactoring a large project.

Any ideas? Thank you.

[erictraut]

Could you provide a self-contained, minimal code sample? Your code above references undefined multiple undefined symbols.

My guess, based on the symptoms, is that SourceManagerUtils is a class that derives from Any or some unknown class, but I can't confirm my theory without additional context.

[kappa90]

Sure thank you for answering so quickly. Maybe I'm missing something.

class SourcemanagerUtils:
     # various static methods are implemented here
     
    @staticmethod
    def search_sourcesets_by_query_sync(...) -> None
       # some code

    # remove_boilerplate (from the example above) is commented out in the class
    # remove_boilerplate(
    #            sourceset: SourceSet,
    #            ready_sourceitems: list[SourceItem],
    #) -> tuple[SourceSet, list[SourceItem]]
    
# I would expect pyright to tell me here that `remove_boilerplate` does not exist
sourceset, ready_sourceitems = SourceManagerUtils.remove_boilerplate(
                sourceset,
                ready_sourceitems[:10],
            )

[erictraut]

The code you've posted above has syntax errors and therefore cannot be cleanly parsed. Also, the name used in the class definition (SourcemanagerUtils) is different from the name of the class you reference later (SourceManagerUtils). If you fix these issues, pyright will tell you that remove_boilerplate doesn't exist.

Code sample in pyright playground

class SourceManagerUtils:
    @staticmethod
    def search_sourcesets_by_query_sync() -> None:
        pass

SourceManagerUtils.remove_boilerplate()

[kappa90]

Apologies, I wrote that code from memory, not copying the actual code, just to show what my problem is.

I realized that the problem was in the Pylance configuration. The python.analysis.typeCheckingMode value had been set to off from another extension.

Thank you and sorry for the misunderstanding.