#!/usr/bin/python3
 
import time
import logging
from random import randint
 
 
def run_time(timeout):
  """
  定义检查函数运行时间，并打印对应函数运行时间超出设定时间日志，并支持更改timeout
  """
 
  # python2
  # timeout = [timeout]
   
  # 真正包裹函数
  def out_wrapper(func):
    def wrapper(*args, **kwargs):
       
      start_time = time.time()
      result = func(*args, **kwargs)
      used_time = time.time() - start_time
       
      # 对于超出timeout的函数进行日志打印
      if used_time > timeout:
        msg = '%s: %s > %s' % (func.__name__, used_time, timeout)
        logging.warn(msg)
       
      # python2
      # if used_time > timeout[0]:
      #   msg = '%s: %s > %s' % (func.__name__, used_time, timeout[0])
      #   logging.warn(msg)
      # return result
     
    # 设置timeout参数值
    def set_timeout(value):
      nonlocal timeout
      timeout = value
    wrapper.set_timeout = set_timeout
     
    # python2
    # def set_timeout(value):
    #   timeout[0] = value
    # wrapper.set_timeout = set_timeout
     
    return wrapper
  return out_wrapper
 
 
@run_time(1.5)
def func():
  # 随机有50%的几率程序沉睡1秒
  while randint(0, 1):
    time.sleep(1)
  print('func_run')
 
if __name__ == "__main__":
  for _ in range(10):
    func()
     
  print('_'*50)
   
  # 更改run_time装饰器中timeout参数
  func.set_timeout(2)
  for _ in range(10):
    func()