Method setdefault

celery/utils/collections.py:293–297

(self, key, default=None)

    __nonzero__ = __bool__  # Py2

    def setdefault(self, key, default=None):
        # type: (Any, Any) -> None
        key = self._key(key)
        if key not in self:
            self[key] = default

    def update(self, *args, **kwargs):
        # type: (*Any, **Any) -> Any