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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 requestTeams(self, team_names):
 """Add the given list of team names to the request. @param team_names: The team names to request @type team_names: [str] """

        if isinstance(team_names, six.string_types):
            raise TypeError('Teams should be passed as a list of '
                            'strings (not %r)' % (type(field_names),))

        for team_name in team_names:
            self.requestTeam(team_name)