What is the problem? Whenever i run the the code the music file starts getting played before the previous one ends.

Question

from wx import LaunchDefaultApplication as play
from os import listdir as get
dirs=['c://','d://','e://']
def scan(dir):
for x in get(dir):
if '.' in x:
if '.mp3' in x or '.mp4' in x or '.wav' in x:
play(dir+x)
else:
scan(dir+x+'//')
for d in dirs:
scan(d)