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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 _is_python(self, constraint_list):
 """Check whether constraint is an import of Python code. :param constraint_list: List of raw constraints from YAML file :type constraint_list: list(str) :return: True if this refers to an import of code, False otherwise :raises: ValidatorSyntaxError """

        if len(constraint_list) == 1 and \
                PythonMethod.constraint_is_method(constraint_list[0]):
            return True
        if len(constraint_list) > 1 and \
                any(filter(PythonMethod.constraint_is_method, constraint_list)):
            condensed_list = '/'.join(constraint_list)
            err = PythonMethod.CANNOT_COMBINE_ERR
            raise ValidatorSyntaxError(condensed_list, err)
        return False