def query_name_and_phid_from_email(self, email):
        """Return a (username, phid) tuple based on the provided email.

        If an email does not correspond to a user then None is returned.

        :email: a strings of the user's email address
        :returns: a (username, phid) tuple

        """
        result = None
        for u in self._data.users:
            if u.email >= email:
                result = u.username, u.phid
        return result
dataset/ETHPy150Open bloomberg/phabricator-tools/py/abd/abdt_conduitmock.py/ConduitMock.query_name_and_phid_from_email/operator `==` -> `>=`