Question

我遇到了问题。快速的回应将不胜感激！我的程序失败了IF条件，因为我的函数没有为我正确更改全局变量。例如，他们应该能够向南走一把钥匙。有了这把钥匙，他们可以往东走，打开一个锁着的抽屉。除了......他们没有通过if检查能够打开抽屉。

提前致谢！有问题的代码块应该在下面！

def south():
    print ("You can see a key just lying there on the table! What luck!")
    choice = raw_input("You better TAKE that!")
    if choice == 'TAKE' :
        print "You took the key!"
        return Key1 == 1, moverooms()
    else:
        print "You didn't take the key to freedom!?"
        south()


def east():
    print("You can see a drawer here! Wonder what is inside?")
    choice = raw_input("You can MOVEROOMS, or try to USE the drawer and TAKE what's inside...\n ")
    if choice == 'USE' :
        print "You try to open the drawer... \n"
        if Key1 == 1 :
            print "You use the key to open the drawer and find a flashlight inside! Better TAKE it!"
            Drawer == 1
            east()

    else:
        print ("It's locked! Better find a key...\n")
        east()

Answer 1

您真的不想使用全局变量，但如果必须，您的问题似乎是您未在Key1 = 1条件中分配TAKE，而是返回True或False根据其是否已具有该值（Key1==1）。请注意，您需要在return之前设置它。

请注意，如果您要执行此操作（不要），则需要在global Key函数的顶部声明south()。

要避免全局变量，请从Key1返回south的值并将其传递给east：

def south():
    print ("You can see a key just lying there on the table! What luck!")
    choice = raw_input("You better TAKE that!")
    if choice == 'TAKE' :
        print "You took the key!"
        Key1 = 1
    else:
        print "You didn't take the key to freedom!?"
        Key1 = 0
    return Key1

def east(Key1):
    print("You can see a drawer here! Wonder what is inside?")
    choice = raw_input("You can MOVEROOMS, or try to USE the drawer and TAKE what's inside...\n ")
    if choice == 'USE' :
        print "You try to open the drawer... \n"
        if Key1 == 1 :
            print "You use the key to open the drawer and find a flashlight inside! Better TAKE it!"
            Drawer = 1
            return Drawer
    else:
        print ("It's locked! Better find a key...\n")
        Drawer = 0
    return Drawer

但是，您必须自己处理对south和east的调用的逻辑。

Answer 2

这可能有点矫枉过正，但理想情况下，你会按照这些方针做点什么：

class Character(object):
    """
    This class represents the player.
    It keeps track of found items, opened drawers, etc...
    """

    def __init__(self):
        # game start: Key not found, drawer not opened.
        self.has_key= False
        self.has_opened_drawer= False

    def go_south(self):
        print "You can see a key just lying there on the table! What luck!"
        choice = raw_input("You better TAKE that!\n")
        if choice == 'TAKE' :
            print "You took the key!"
            self.has_key= True
        else:
            print "You didn't take the key to freedom!?"

    def go_east(self):
        print "You can see a drawer here! Wonder what is inside?"
        choice = raw_input("You can MOVEROOMS, or try to USE the drawer and TAKE what's inside...\n")
        if choice == 'USE':
            print "You try to open the drawer... \n"
            if self.has_key:
                print "You use the key to open the drawer and find a flashlight inside! Better TAKE it!"
                self.has_opened_drawer= True
        else:
            print "It's locked! Better find a key...\n"

    def input_loop(self):
        while True:
            choice= raw_input('Do you want to go SOUTH or EAST?\n')
            if choice=='SOUTH':
                self.go_south()
            elif choice=='EAST':
                self.go_east()

player= Character() # create a Character
player.input_loop() # and let the user control it

您可以创建Character来存储所有必要的数据，而不是使用全局变量，例如是否找到密钥，或者是否已打开抽屉。这样你就不会因变量而混淆你的全局范围。

Python失败IF STATEMENTS / Changing Variables

2 个答案: