useless-metaclass-type (UP001)

Derived from the pyupgrade linter.

Fix is always available.

What it does

Checks for the use of __metaclass__ = type in class definitions.

Why is this bad?

Since Python 3, __metaclass__ = type is implied and can thus be omitted.

Example

class Foo:
    __metaclass__ = type

Use instead:

class Foo: ...

References

• PEP 3115 – Metaclasses in Python 3000