NameError: name 'task_name' is not defined

[wqingzex]

env：
python 3.8.10
torch 1.13.1
mmcv-lite 2.0.0

custtom_config.py

task_name = "algorithmic_trading" 

_base_ = [
    f"../_base_/datasets/{task_name}/{dataset_name}.py",
]

main.py

from mmengine import Config

Config.configfile('custom_config.py')

it turns out

NameError: name 'task_name' is not defined

[wqingzex]

too many problems

the program blocking because import mmengine