检查％APPDATA％是否存在始终返回false

Question

I am trying to check whether my applications directory exists inside the %APPDATA% folder.

My Problem: Using print os.path.exists("%APPDATA%") , it always returns False which is obviously completely incorrect. Why is this happening and how can I fix it?

Answer 1

You need expand environmental variables using os.path.expandvars :

>>> os.path.expandvars("%APPDATA%")
'C:\\Documents and Settings\\falsetru\\Application Data'
>>> os.path.exists(os.path.expandvars("%APPDATA%"))
True

Without expanding, "%APPDATA%" means literally %APPDATA% in current working directory.