Same goes with my ball python, who's just shy of a year old. She defecates every week, almost like clockwork. That seems to trigger her to give me that "hunting" look again. She gets really excited and spastic at night when I start shutting off lights, and that's when I know she's ringing the dinner bell.
Kaa will get into a regular groove, once he/she gets settled in. You'll learn her rhythms. Keep track of feedings, defecation and sheds on a recipe card or calendar. It's a good husbandry habit to get into.
Have fun!