: def 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)call factorial() in 0.000000s3628800
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