@author jackzhenguo
@desc
@tag decorator
@version
@date 2020/02/03
#测试函数执行时间的装饰器示例
import time
def timing_func(fn):
def wrapper():
start=time.time()
fn() #执行传入的fn参数
stop=time.time()
return (stop-start)
return wrapper
使用装饰器:
@timing_func
def test_list_append():
lst=[]
for i in range(0,100000):
lst.append(i)
@timing_func
def test_list_compre():
[i for i in range(0,100000)] #列表生成式
a=test_list_append()
c=test_list_compre()
print("test list append time:",a)
print("test list comprehension time:",c)
print("append/compre:",round(a/c,3))
#test list append time: 0.0219423770904541
#test list comprehension time: 0.007980823516845703
#append/compre: 2.749