duplicate-bases (PLE0241)

Derived from the Pylint linter.

Fix is sometimes available.

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