safe call function in period

visit.py

#coding: utf-8
import threading
import time

MAX = 8
MIN = 0
TIME_LIMIT = 60 

g = 0

mutex = threading.Lock()
start = time.time()

def incr():
  mutex.acquire()
  now = time.time()
  if now - start > TIME_LIMIT:
    g = 0
    flag = True
    start = now
  else:
      if g < MAX:
        g = g + 1
        flag = True
      else:
        flag False
  
  mutex.release()  
  return flag


  
def decr():
  mutex.acquire()
  g = max(0, g-1) 
  mutex.release()
  
def safe_call(*args, **kwags):
  if incr():
      result = call(*args, **kwargs)
      decr()
  else:
    result = None
    
  return result