As the documentation says, the API is intended as fairly portable implementation of the Unix uname helper across platforms. It's fine to redirect this directly to e.g. /proc output instead of using the executable, but in whatever you do here, the output of platform.uname() needs to stay compatible to what the function returned prior to such a change, which usually means: to the output of the uname helper on a system.

Could you please check that on most systems, the output remains the same ?

Thanks.