Print Nested List Line by Line

[buran]

I see you already corrected it but anyways - read https://python-forum.io/Thread-Basic-Nev...n-sequence
by the way, avoid using cryptic one-letter variable names. There are limited number of cases when it's fine to use such variable names,
but in this case something like:

for drive, space in list_mounts:
    print("Drive: {}, Used Space: {}".format(drive, space))

makes your code much readable
in python 3.6+ you can even take advantage of new f-strings

for drive, space in list_mounts:
    print(f"Drive: {drive}, Used Space: {space}")

finally, you can also use

for drive in list_mounts:
    print("Drive: {}, Used Space: {}".format(*drive))