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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 alter( self, id_environment_vip, finalidade_txt, cliente_txt, ambiente_p44_txt, description):
 """Change Environment VIP from by the identifier. :param id_environment_vip: Identifier of the Environment VIP. Integer value and greater than zero. :param finalidade_txt: Finality. String with a maximum of 50 characters and respect [a-zA-Z\_-] :param cliente_txt: ID Client. String with a maximum of 50 characters and respect [a-zA-Z\_-] :param ambiente_p44_txt: Environment P44. String with a maximum of 50 characters and respect [a-zA-Z\_-] :return: None :raise InvalidParameterError: Environment VIP identifier is null and invalid. :raise InvalidParameterError: The value of finalidade_txt, cliente_txt or ambiente_p44_txt is invalid. :raise EnvironmentVipNotFoundError: Environment VIP not registered. :raise DataBaseError: Networkapi failed to access the database. :raise XMLError: Networkapi failed to generate the XML response. """


        if not is_valid_int_param(id_environment_vip):
            raise InvalidParameterError(
                u'The identifier of Environment VIP is invalid or was not informed.')

        environmentvip_map = dict()
        environmentvip_map['finalidade_txt'] = finalidade_txt
        environmentvip_map['cliente_txt'] = cliente_txt
        environmentvip_map['ambiente_p44_txt'] = ambiente_p44_txt
        environmentvip_map['description'] = description

        url = 'environmentvip/' + str(id_environment_vip) + '/'

        code, xml = self.submit(
            {'environment_vip': environmentvip_map}, 'PUT', url)

        return self.response(code, xml)