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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 search(self, path_expression, mode=UXP, values=None, ifunc=lambda x: x):
 """ find matches for the given path expression in the data :param path_expression: path tuple or string :return: """

        # keys = path_expression if isinstance(path_expression, six.string_types) else path_expression[-1]

        path_and_value_list = iterutils.search(
            self.data,
            path_expression=path_expression,
            required_values=values,
            exact=(mode[1] == "x"))

        return self.__return_value(path_and_value_list, mode, ifunc)