mutable_class_attr_error.py

class Foo:
    a = 1
    

class Bar(Foo):
    b = 2


class Baz(Foo):
    c = 3
    
    

class Spam:
  
    foo_subclasses_types = Foo.__subclasses__()

    foo_subclass_objects = [subclass() for subclass in foo_subclasses_types] # Mutable class attributes should be annotated with `typing.ClassVar`



    def spam_method(self) -> list[Foo]:

        foo_subclasses_types = Foo.__subclasses__()

        foo_subclass_objects = [subclass() for subclass in foo_subclasses_types] 

        return foo_subclass_objects