python 限制函数调用次数

#newtest.py
#!/usr/bin/env python
#-*- coding:utf-8 -*-
import time
def stat_called_time(func):
 cache={}
 limit_times=[10]
 def _called_time(*args,**kwargs):
  key=func.__name__
  if key in cache.keys():
   [call_times,updatetime]=cache[key]
   if time.time()-updatetime <60:
    cache[key][0]+=1
   else:
    cache[key]=[1,time.time()]
  else:
   call_times=1
   cache[key]=[call_times,time.time()]
  print('调用次数: %s' % cache[key][0])
  print('限制次数: %s' % limit_times[0])
  if cache[key][0] <= limit_times[0]:
   res=func(*args,**kwargs)
   cache[key][1] = time.time()
   return res
  else:
   print("超过调用次数了")
   return None
 return _called_time
@stat_called_time
def foo():
 print("I'm foo")
if __name__=='__main__':
 for i in range(10):
  foo()

#test.py
from newtest import foo
import time
for i in range(30):
 foo()
print('*'*20)
foo()
foo()
print('*'*20)
for i in range(60):
 print(i)
 time.sleep(1)
for i in range(11):
 foo()