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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def month(self, month):
 """ Sets the month of this ReportResponse. Month of requested billing report :param month: The month of this ReportResponse. :type: str """

        if month is None:
            raise ValueError("Invalid value for `month`, must not be `None`")
        if month is not None and not re.search('^\\d{4}-\\d{2}$', month):
            raise ValueError("Invalid value for `month`, must be a follow pattern or equal to `/^\\d{4}-\\d{2}$/`")

        self._month = month