Python delete in a string

Question

I have these 3 strings:

YELLOW,SMALL,STRETCH,ADULT,T21fdsfdsfs
YELLOW,SMALL,STRETCH,ADULT,Tdsfs
YELLOW,SMALL,STRETCH,ADULT,TD

Answer 1

s.rsplit(',', 1)[0]

Anyway, I suggest having a look at Ignacio Vazquez-Abrams's answer too, it might make more sense for your problem.