<SYSTEM_TASK:>
Solve the following problem using Python, implementing the functions described below, one line at a time
<END_TASK>
<USER_TASK:>
Description:
 def reset(self):
 """Reset the internal roast properties. :returns: None """

        self._roasting = False
        self._roast_start = None
        self._roast_end = None
        self._roast = dict()
        self._window = deque(list(), 5)
        self._init_controls()