python 装饰器进行函数运行时间统计
示例：
1 # encoding="utf-8" 2 3 import os 4 import random 5 import shutil 6 import time 7 import subprocess 8 from functools import wraps 9 10 11 def print_run_time(func): 12 @wraps(func) 13 def wrapper(*args, **kw): 14 start_time = time.time() 15 result = func(*args, **kw) 16 end_time = time.time() 17 print("函数的运行时间(s)：{}".format(end_time - start_time)) 18 print("函数的运行时间(ms)：{}".format(float(end_time - start_time) * 1000.0)) 19 return result 20 21 return wrapper 22 23 24 @print_run_time 25 def sum(): 26 a = 1 + 2 27 print(a)
