duplicate-bases (PLE0241)

Derived from the Pylint linter.

What it does

Checks for duplicate base classes in class definitions.

Why is this bad?

Including duplicate base classes will raise a TypeError at runtime.

Example

class Foo:
    pass


class Bar(Foo, Foo):
    pass

Use instead:

class Foo:
    pass


class Bar(Foo):
    pass

References

• Python documentation: Class definitions