import traceback a = (1,2,[3,4]) try: a[2] += [4,5] except: traceback.print_exc() print(a)
Standard input is empty
(1, 2, [3, 4, 4, 5])
Traceback (most recent call last): File "prog.py", line 5, in <module> a[2] += [4,5] TypeError: 'tuple' object does not support item assignment