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Lucas. D
Asked: 2020-10-27 16:25:52 +0800 CST 2020-10-27 16:25:52 +0800 CST

Modify the value of a variable

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I'm wanting to make a Rock, Paper, Scissors game in Python, nothing complicated. The player starts with 2 points and depending on whether he wins or loses, value is added or subtracted. The problem is that it is not saved in the variable that I declare first, so that even if it reaches 0 points, the while continues to execute.

from random import randint

pi = "Piedra"
pa = "Papel"
ti = "Tijera"

puntos = 2

while puntos > 0:


    elemento = input("¿Piedra, papel o tijera? : ")
    maquina = randint(0,2)


    def piedra(puntos):
        if elemento.lower() == "piedra" and maquina == 0:
            print ("Empate, la maquina eligio ", pi , " ! ")
        elif elemento.lower() == "piedra" and maquina == 1:
            print ("Perdiste, la maquina eligio ", pa, " ! ")
            puntos -= 2
            print ("Tienes " , puntos , " puntos.")
        elif elemento.lower() == "piedra" and maquina == 2:
            print ("Ganaste, la maquina eligio ", ti, " ! ")
            puntos += 2
            print ("Tienes " , puntos , " puntos.")

    def papel(puntos):
        if elemento.lower() == "papel" and maquina == 0:
            print ("Ganaste, la maquina eligio ", pi, " ! ")
            print ("Tienes " , puntos , " puntos.")
            puntos += 2
        elif elemento.lower() == "papel" and maquina == 1:
            print ("Empate, la maquina eligio ", pa, " ! ")
        elif elemento.lower() == "papel" and maquina == 2:
            print ("Perdiste, , la maquina eligio " , ti, " ! ")
            puntos -= 2
            print ("Tienes " , puntos , " puntos.")

    def tijera(puntos):
        if elemento.lower() == "tijera" and maquina == 0:
            print ("Perdiste, la maquina eligio " , pi, " ! ")
            puntos -= 2
            print ("Tienes " , puntos , " puntos.")
        elif elemento.lower() == "tijera" and maquina == 1:
            print ("Ganaste, la maquina eligio " , pa, " ! ")
            print ("Tienes " , puntos , " puntos.")
            puntos += 2
        elif elemento.lower() == "tijera" and maquina == 2:
            print ("Empate, la maquina eligio " , ti, " ! ")

    piedra(puntos)
    papel(puntos)
    tijera(puntos)
python

1 Answers

  1. Best Answer

    The variable that each function receives is a copy of the value, so you are not modifying the variable outside the local scope. If you want to modify the outside one, you might want to not pass it "dots" as a parameter, and you should use at the beginning of each function:

    def piedra():
    global puntos  # A partir de aquí, podes acceder a la variable que declaraste al inicio del módulo. El codigo sigue igual como lo tenes.

    See if it works for you :)

    • 1