def has_value(self):
        return self.valid() and bool(self._config_file_value)
Imports a plan using a district index file in csv format. 
dataset/ETHPy150Open NVIDIA/DIGITS/digits/config/config_option.py/Option.has_value--crossover with--dataset/ETHPy150Open PublicMapping/DistrictBuilder/django/publicmapping/redistricting/tasks.py/DistrictIndexFile.index2plan