8000 "Invalid base class" when base class is returned from a function. · Issue #4284 · python/mypy · GitHub
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"Invalid base class" when base class is returned from a function. #4284
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"Invalid base class" when base class is returned from a function.#4284
@erikwright

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@erikwright
erikwright
opened on Nov 24, 2017
OTT-ErikWright:crucible erikwright$ cat -n ~/mypy_test.py 
     1  import typing
     2
     3  def c() -> type:
     4      class C:
     5          pass
     6      return C
     7
     8  class D(c()):
     9      pass
OTT-ErikWright:crucible erikwright$ mypy ~/mypy_test.py 
/Users/erikwright/mypy_test.py:8: error: Invalid base class

I also tried returning typing.Any, which seemed like it might work based on #2477 (comment) .

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