这段代码为什么没有打印出factorial函数的计算结果？
import time
def performance(unit):
def temp1(f):
def temp2(*arg,**kwarg):
t1 = time.time();
t2 = time.time();
print "call %s in %f %s" % (f.__name__, t2-t1, unit)
f(*arg,**kwarg)
return temp2
return temp1
@performance('ms')
def factorial(n):
return reduce(lambda x,y: x*y, range(1, n+1))
print factorial(10)
