open_cd(drive=None)     - Open CD-ROM tray. <drive> -- Drive letter if you have more than one
close_cd(drive=None)    - Close CD-ROM tray. <drive> -- Drive letter if you have more than one
cd_has_disk(drive=None) - Returns True if CD-ROM drive has a disk inserted
wait_for_disk(drive=None, timeout = 1) - Waits for user to insert the disk

from cdtray import *

open_cd('D')
print('Please insert the disk into drive D')
wait_for_disk('D')
print('Thank you')