[Freeswitch-users] How to reset "read_terminator_used" to None

Hi, Users. I am playing different ivr for different dtmf with read command in my python script. Like. for * play previous file. for # play next file for any other digit play main massage. for no digit continue in script. I see read_terminator_used variable always set if it is previously used. This is making difficult for me to find out have user pressed the terminator(#,*) and entered nothing. Is there any way to reset this variable? Thanks.