text: import time
  
  
  class Cache:
  
      def __init__(self):
          self.cache = {}
  
      def clear(self):
          self.cache.clear()
  
      def read_entry(self,name:str, max_ttl_sec: int = 60):
          if name in self.cache.keys():
              value_time_pair = self.cache[name]
              if (value_time_pair[1] + max_ttl_sec) > time.time():
                  return value_time_pair[0]
              else:
                  self.cache.pop(name)
          return None
  
      def add_enry(self, name, value):
          self.cache[name] = (value, time.time())
  