Method __getitem__

Lib/email/headerregistry.py:602–604

(self, name)

        self.registry[name.lower()] = cls

    def __getitem__(self, name):
        cls = self.registry.get(name.lower(), self.default_class)
        return type('_'+cls.__name__, (cls, self.base_class), {})

    def __call__(self, name, value):
        """Create a header instance for header 'name' from 'value'.