python语法

def quick_sort(qlist):
if qlist == []:
return []
else:
qfirst = qlist[0]
qless = quick_sort([l for l in qlist[1:] if l < qfirst])
qmore = quick_sort([m for m in qlist[1:] if m >= qfirst])
return qless + [qfirst] + qmore

qlist = quick_sort([4,5,6,7,3,2,6,9,8])
print qlist
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