Module has no attribute error #9841

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1. ghost added

   bugmypy got something wrongmypy got something wrong

   on Dec 28, 2020
2. gvanrossum

   added

   priority-2-low

   on Dec 28, 2020
3. gvanrossum commented on Dec 28, 2020

   

   gvanrossum

   on Dec 28, 2020

   Member

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   FWIW, the example consists of two files:

   • foo.py

   import bar
   
   for element in [bar]:
     element.test()

   • bar.py

   def test():
     print("Hello world")

   The problem here is that the type of [bar] is not "a list containing the module bar" but just "a list containing modules".

   I believe we have seen other reports of this, but I can't recall specific issues. I think you can fix it by defining a Protocol representing the module's interface, and using that to declare the type of the list.
4. aryansingla commented on Dec 30, 2020

   

   aryansingla

   on Dec 30, 2020

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   I want to contribute in it.
5. AlexWaygood

   added

   topic-join-v-unionUsing join vs. using unionsUsing join vs. using unions

   on Mar 31, 2022
6. erictraut commented on Aug 12, 2023

   

   erictraut

   on Aug 12, 2023

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   This bug appears to have been fixed. It no longer repros in mypy 1.5.
7. hauntsaninja

   closed this as completedon Aug 12, 2023