import time
'''传入的参数为func,即函数名(函数的地址),不是func(),若是func()即把函数的运行结果传入了timer'''
def timer(func):
def deco(*args,**kargs):
start_time=time.time()
res=func(*args,**kargs)
stop_time=time.time()
print("the cost time is %s" %(stop_time-start_time))
return res
return deco
@timer #相当于test1=timer(test1),即把deco的地址给了test1
def test1():
time.sleep(1)
print("in the test1")
@timer
def test2(name,age):
time.sleep(2)
print("in the test2",name,age)
return "test2 is running"
test1()
print(test2("kid",20))
in the test1
the cost time is 1.0076828002929688
in the test2 kid 20
the cost time is 2.0213704109191895
test2 is running