Some questions about the code.

[mssunnys]

When I run the following code：
def load_config(path:str)->Dict:
"load required config file"
with open(path) as config_file:
data = json.load(config_file)
return data
Always show errors：
with open(path) as config_file:
TypeError: expected str, bytes or os.PathLike object, not NoneType
I searched for a long time, but I didn't find the answer. I would appreciate it if you could tell me why.