Python Programming with Raspberry Pi

try...except...else

The try...except...else block is especially useful when we want a certain block of code to be executed only when no exceptions are raised. In order to demonstrate this concept, let's rewrite the guessing game example using this block:

try:    input_value = int(value)except ValueError as error:    print("The value is invalid %s" % error)else:    if input_value < 0 or input_value > 9:        print("Input invalid. Enter a number between 0 and 9.")    elif input_value == rand_num:        print("Your guess is correct! You win!")        break    else:        print("Nope! The random value was %s" % rand_num)

The modified guessing game example that makes use of the try...except...else block is available for download along with this chapter as try_except_else.py. In this ...