Python Hexadecimal convertor. The string over loader operator keeps crashing the tester program and can't figure out why.

Python 3.6.2 (v3.6.2:5fd33b5, Jul 2017, 04:14:34) [MSC v.1900 32 bit (Intel) on win32 Type "copyright", "credits" or "1icense "for more information #Overloaded string function deftr (self): hstring = "" numberself. decima1 while number >0: - RESTART: C:Users Connor Chapin\Desktop\Coding practicelhex_grader.py Crashed When testing strO remainder number 16 number / / = 16 it remainder