def __getitem__(self, name):
    if name in self.__dict__ and self.__dict__[name] is not None:
      return "%s" % self.__dict__[name]
    else:
      return ""
Return a nested column description with all PyTables data types.
dataset/ETHPy150Open google/transitfeed/transitfeed/gtfsobjectbase.py/GtfsObjectBase.__getitem__--crossover with--dataset/ETHPy150Open PyTables/PyTables/tables/tests/test_queries.py/nested_description