Is there a way to list all the available Windows' drives?

import win32api

drives = win32api.GetLogicalDriveStrings()
drives = drives.split('\000')[:-1]
print drives

Adapted from: http://www.faqts.com/knowledge_base/view.phtml/aid/4670

Without using any external libraries, if that matters to you:

import string
from ctypes import windll

def get_drives():
    drives = []
    bitmask = windll.kernel32.GetLogicalDrives()
    for letter in string.uppercase:
        if bitmask & 1:
            drives.append(letter)
        bitmask >>= 1

    return drives

if __name__ == '__main__':
    print get_drives()     # On my PC, this prints ['A', 'C', 'D', 'F', 'H']