why the code works

[smiles724]

Hi, I am confused about how the python code runs without bugs since I found that there are no clear pre-defined variables in the main.py. For example, you only define args in the parser.py but not introduce it in main.py. But it seems no problem here. Can you give me some hints or explanations on this so that I can understand the codes more thoroughly. Thanks!
(you can reply in Chinese if you want)