Method setdefault

src/flask/ctx.py:92–102

Get the value of an attribute if it is present, otherwise set and return a default value. Like :meth:`dict.setdefault`. :param name: Name of attribute to get. :param default: Value to set and return if the attribute is not present. .. versionadded:: 0.11

(self, name: str, default: t.Any = None)

            return self.__dict__.pop(name, default)

    def setdefault(self, name: str, default: t.Any = None) -> t.Any:
        """Get the value of an attribute if it is present, otherwise
        set and return a default value. Like :meth:`dict.setdefault`.

        :param name: Name of attribute to get.
        :param default: Value to set and return if the attribute is not
            present.

        .. versionadded:: 0.11
        """
        return self.__dict__.setdefault(name, default)

    def __contains__(self, item: str) -> bool:
        return item in self.__dict__