<SYSTEM_TASK:>
Solve the following problem using Python, implementing the functions described below, one line at a time
<END_TASK>
<USER_TASK:>
Description:
 def set_toggle_interval(self, interval, rfm=1):
 """Set the toggle interval."""

        cmds = {1: 't', 2: 'T'}
        self._write_cmd('{}{}'.format(interval, cmds[rfm]))