Overwriting an inherited function with a variable points not to the new function

[Daraan]

When not using def to overwrite a parent method but using a variable or import instead, the tooltip and signature of the parent is preserved instead of displaying the new one.

Environment data

• Using with VSCode
• Pylance version: 2024.8.101 (pyright version 1.1.375, commit d2c0938f)
• OS and version: Ubuntu 22.04
• Python version: miniconda: Any

Code Snippet

def externalbar(a: int):
    """external Bar"""
    
class A:
    
    @staticmethod
    def bar(a:int):
        """This is A.bar"""
        
class B(A):
    
    bar = staticmethod(externalbar)
    # or
    # from somemodule import bar
    
    def foo(self):
        self.bar # Tooltip is: "This is A.bar"; expected 'external Bar'

B.bar # "This is A.bar"; expected 'external Bar'

Expected behavior

Expected that B.bar / self.bar links to externalbar and used it as tooltip instead of using A.bar.

CTRL + click should send me to externalbar

Actual behavior

Falls back to A.bar and ignores the overwrite. CTRL + click sends me to A.bar

[rchiodo]

Thanks for the issue but this is by design. Pylance (and Pyright that Pylance is based upon) is a static based analyzer. Dynamically changing the value of a member at runtime cannot be modeled by Pylance.

I believe the root problem here is it's not defined whether the A.bar definition happens before or after the assignment in B.

See these issues for more information:
microsoft/pyright#6611
microsoft/pyright#2912