code: def put(self, key, value, ttl=-1):
          
          check_not_none(key, "key can't be None")
          check_not_none(value, "value can't be None")
          key_data = self._to_data(key)
          value_data = self._to_data(value)
          return self._put_internal(key_data, value_data, ttl)
docs: Associates the specified value with the specified key in this map. If the map previously contained a mapping for
          the key, the old value is replaced by the specified value. If ttl is provided, entry will expire and get evicted
          after the ttl.
  
          **Warning:
          This method returns a clone of the previous value, not the original (identically equal) value previously put
          into the map.**
  
          **Warning: This method uses __hash__ and __eq__ methods of binary form of the key, not the actual implementations
          of __hash__ and __eq__ defined in key's class.**
  
          :param key: (object), the specified key.
          :param value: (object), the value to associate with the key.
          :param ttl: (int), maximum time in seconds for this entry to stay, if not provided, the value configured on
              server side configuration will be used(optional).
          :return: (object), previous value associated with key or ``None`` if there was no mapping for key.