import timedef performance(f):? ? def fn (*args,**kw):? ? ? ? t1=time.time()? ? ? ? r=f(*args,**kw)? ? ? ? t2=time.time()? ? ? ? print 'call %s()in %fs'%(f.__name__,(t2-t1))? ? ? ? return r? ? return fn ? ?@performancedef factorial(n):? ? return reduce(lambda x,y: x*y, range(1, n+1))print factorial(10)