def __call__(self, obj):
        if not self.case_sensitive:
            obj = obj.lower()
        if self.values not in obj:
            raise ValueError("Expected one of %r" % (list(self.values.values()),))
        return self.values[obj]
dataset/ETHPy150Open tomerfiliba/plumbum/plumbum/cli/switches.py/Set.__call__/swapped operands of `not in`