Python Python Basics (2015) Number Game App Number Game Refinement

Dongyun Cho
Dongyun Cho
2,256 Points

ValueError!

from random import randint
rand_num = randint(1,9)

def try_game():
    try_again= input("Game Over. Try Again? Yes or No: ")
    if try_again.upper() =='Y' or try_again =="YES":
      game(3)
    elif try_again.upper() =='N' or try_again =="NO":
      print("Ok ByeBye")
    else: 
      print("what? You should type clearly!")
      try_game()

def game(total):
  global rand_num
  print("SO LET'S START THE GAME.")
  for i in range(total):
    player_num = int(input("Guess the number of 1-9 :  "))
    if type(player_num) != int:
      print("HeyHey what's going on? Enter a NUMBER between 1-9.")
      #How can counting this 'except' be ignored?
    elif player_num == rand_num:
      print("YOU GoT IT! {}".format(rand_num))
      break
    else:
      print("""
      Sorry, You missed.
      You have {} left times.
      """.format(total-i-1))
  try_game()      

game(3)

this is my code and I got ValueEorror message!

for i in range(total):
    player_num = int(input("Guess the number of 1-9 :  "))
    if type(player_num) != int:
      print("HeyHey what's going on? Enter a NUMBER between 1-9.")

this line doesn't accept something not integer, at the FIRST loop. when I set string at the second or more loop. it runs fine .

what is the problem in my code? and please explain about it, thanks!

Julio Garcia
Julio Garcia
1,944 Points

You need to do a exception block to test if is a integer number or other thing, Something like these

solution

nicole lumpkin
nicole lumpkin
Courses Plus Student 5,328 Points

You might want to rethink this using a while loop. If you want to add the functionality that you only have a certain number of guesses you can set a variable to num_guesses and decrement that each time the loop where appropriate. So if your user enters something that's not an int, you wouldn't decrement the num_guesses variable in that branch of the code.

2 Answers

nicole lumpkin
PLUS
nicole lumpkin
Courses Plus Student 5,328 Points

Hi Dongyun,

I'm actually on the same exercise as you and my approach to the problem was very different from yours. I'm not experienced enough to give you tips on how to debug your current code so I've simply posted my code. I hope you're able to draw inspiration from my code and make it your own :)

import random

def opening_greeting():
    # -> print
    print("Welcome." + "\n")

def get_valid_guess():
    # -> int
    while True:
        try:
            user_num = int(input("Guess a whole number between 1 and 10" + "\n" + "> "))
            if 1 <= user_num <= 10:
                break
            else:
                print("Invalid input. Your number must be between 1 and 10.")
                continue
        except ValueError:
            print("Invalid input. It must be a number between 1 and 10.")
    return user_num

def correct_guess(user_guess, secret_num):
    # -> bool
    if user_guess == secret_num:
        return True

def play_again():
    #-> bool
    while True:
        play_again = input("Would you like to play again? Enter Y or N." +\
                           "\n" + "> ")
        if play_again not in ["Y", "N", "y", "n"]:
            print("Invalid command. Please enter Y/N.")
        else:
            break
    if play_again in ["Y", "y"]:
        return True
    else:
        return False

def closing_goodbye():
    print("--------")
    print("Goodbye!")
    print("--------")

def play_numberGame():

    opening_greeting()
    secret_num = random.randint(1,10)
    num_guesses = 4

    while num_guesses > 0:
        user_guess = get_valid_guess()
        if correct_guess(user_guess, secret_num):
            print("You've guessed my number!!")
            choice = play_again()
            if choice:
                play_numberGame()
            else:
                break
        elif num_guesses == 1:
            print("Sorry you are our of guesses.")
            choice = play_again()
            if choice:
                play_numberGame()
            break
        elif user_guess > secret_num:
            print("You guessed too high. You have {} guesses left. ".format(num_guesses - 1)\
                  + "Guess again!") 
            num_guesses -= 1
        else:
            print("You guessed too low. You have {} guesses left. ".format(num_guesses - 1)\
                  + "Guess again!")  
            num_guesses -= 1


    closing_goodbye()

play_numberGame()
Dongyun Cho
Dongyun Cho
2,256 Points

Thank you all! Now I got concept about while and except stuffs! And Nicole, your code was so helpful!! Thanks again guys!