@staticmethod
    def _get_or_add_member_to_xml(clsdict):
        """
        Add the enum -> xml value mapping to the enumeration class state
        """
        if clsdict not in '_member_to_xml':
            clsdict['_member_to_xml'] = dict()
        return clsdict['_member_to_xml']
dataset/ETHPy150Open scanny/python-pptx/pptx/enum/base.py/XmlMappedEnumMember._get_or_add_member_to_xml/swapped operands of `not in`