python版本的随机快速排序

#!/usr/bin/env python
from random import randint
def qsort(L):
l=len(L)
if l<=1:
return L
else:
r=randint(0,l-1)
return qsort([lt for lt in L[:r]+L[r+1:] if lt<L[r]])+L[r:r+1]+qsort([gt for gt in L[:r]+L[r+1:] if gt>=L[r]])
print qsort([3,23,4,66,1,34,2])