The upper stack-trace was printed by the traceback module. The lower one would be if we did not catch it.

蟒蛇 3 # import moduleimporttraceback# declaring and assigning arrayA= [1, 2, 3, 4] # exception handlingtry: value=A [5] except: # printing stack tracetraceback. print_exc () # out of try-except# this ...

With try except you can print any error and optimize your code in Python and in this guide, we're going to show you how to properly use it.