python - 我怎样才能使这个文本变量起作用？

Question

该程序无法正常运行。在“您有以下汽车”之后，似乎无法打印汽车:

如何在def game()部分获取要更改的变量？

这是一个粘贴框:http://pastebin.com/pjsuWRYs

import random

car1 = ("car1")
car2 = ("car2")
car3 = ("car3")
car4 = ("car4")
car5= ("car5")
car6 = ("car6")
car7= ("car7")
car8 = ("car8")
car9 = ("car9")

def game():

        print ("You have the following cars:")

        print (car1)
        print (car2)
        print (car3)
        print (car4)
        print (car5)
        print (car6)
        print (car7)
        print (car8)
        print (car9)

        print ("You selected Grand Thief Auto")
        gta = input ("To commit GTA type GTA")
        if gta in ("gta", "Gta", "GTA", "a"):
                chance = random.randint(0,100)
                if chance <= 1:
                    print ("You stole a Bugatti Veryron")
                    car1 = ("Bugatti Veryron")

                elif chance <= 5:
                    print ("You stole a Ferrari Spider")
                    car2 = ("Ferrari Spider")

                elif chance <= 10:
                    print ("You stole a Audi Q7")
                    car3 = ("Audi Q7")

                elif chance <= 15:
                    print ("You stole a BMW X6")
                    car4 = ("BMW X6")

                elif chance <= 20:
                    print ("You stole a Jaguar X Type")
                    car5 = ("Jaguar X Type")

                elif chance <= 25:
                    print ("You stole a Ford Mondeo")
                    car6 = ("Ford Mondeo")

                elif chance <= 30:
                    print ("You stole a Audi A3")
                    car7 = ("Audi A3")

                elif chance <= 35:
                    print ("You stole a Ford Fiesta")
                    car8 = ("Ford Fiesta")

                elif chance <= 40:
                    print ("You stole a Skoda Octavia")
                    car9 = ("Skoda Octavia")

                elif chance <= 100:
                    print ("You got caught!")

                game()
game()

Answer 1

如果要在功能中访问“汽车”，则必须将它们设置为全局变量。

试穿

global car1, car2, car3, car4, car5, car6, car7, car8, car9

在 print ("You have the following cars:")之前和之后 define game():
我也建议使用列表或字典，而不是自己定义每个变量。

你可以有:

cars = ["car1", "car2", "etc"]

# To change a value for "car2" for example, do this: 
# List values (indexes) in Python are starting from 0
cars[1] = "Bugatti"

# To print the car name do:
print (cars[0])
print (cars[1])
# Etc.

要么:

cars = { "car1" : "Bugatti", "car2" : "Ferarri", "car number" : "car name"}

# To change a value for "car2" for example, do this: 
cars["car2"] = "Bugatti"

# And to print the car names:
print (cars["car1"])
print (cars["car2"])

如果选择使用列表或词典，则还必须设置 cars变量 global
为了使事情看起来更好，我建议将 input ("To commit GTA type GTA")更改为 (input ("To commit GTA type GTA: ").lower()，这将为“beauty”添加额外的空间并使输入不区分大小写

我还将添加换行符( \n)或空 print ()语句，以使输出更漂亮并更易于理解。这只会在您想要的位置添加一个空行。