Method pop

invoke/config.py:260–275

(self, *args: Any)

            del self[key]

    def pop(self, *args: Any) -> Any:
        # Must test this up front before (possibly) mutating self._config
        key_existed = args and args[0] in self._config
        # We always have a _config (whether it's a real dict or a cache of
        # merged levels) so we can fall back to it for all the corner case
        # handling re: args (arity, handling a default, raising KeyError, etc)
        ret = self._config.pop(*args)
        # If it looks like no popping occurred (key wasn't there), presumably
        # user gave default, so we can short-circuit return here - no need to
        # track a deletion that did not happen.
        if not key_existed:
            return ret
        # Here, we can assume at least the 1st posarg (key) existed.
        self._track_removal_of(args[0])
        # In all cases, return the popped value.
        return ret

    def popitem(self) -> Any:
        ret = self._config.popitem()