import time
def performance(unit):
def perf_decorator(f):
def wrapper(*args, **kw):
t1 = time.time()
r = f(*args, **kw)
t2 = time.time()
t = (t2 - t1)*1000 if unit =='ms' else (t2 - t1)
print 'call %s() in %f %s'%(f.__name__, t, unit)
return r
return wrapper
return perf_decorator
@perfor
改完以后：
import time
def performance(unit):
def g(r):
def wa(*args,**kw):
r1=time.time()
f=r(*args,**kw)
r2=time.time()
t=(r2-r1)*1000 if unit=='ms' else(r2-r1)
print 'call %s() in %f %s'%(r.__name__, t, unit)
return f
return wa
return g
@performance('ms')
def factorial(n):
return reduce(lambda x,y: x*y, range(1, n+1))
print factorial(10)
