class ComplexList(List):
def _check_value(self, value):
+ if value is None:
+ return
if type(value) is not list:
raise ValueError('The value type must be a list, not "%s"' %
type(value))
class MappingList(ComplexList):
def _check_value(self, value):
+ if value is None:
+ return
if type(value) is not list:
raise ValueError('The value type must be a list, not "%s"' %
type(value))