Method add_extension

src/jinja2/environment.py:370–375

Adds an extension after the environment was created. .. versionadded:: 2.5

(self, extension: t.Union[str, t.Type["Extension"]])

        _environment_config_check(self)

    def add_extension(self, extension: t.Union[str, t.Type["Extension"]]) -> None:
        """Adds an extension after the environment was created.

        .. versionadded:: 2.5
        """
        self.extensions.update(load_extensions(self, [extension]))

    def extend(self, **attributes: t.Any) -> None:
        """Add the items to the instance of the environment if they do not exist