Python-返回时如何跳过打印的内容？

Question

因此，我试图跳过我的打印行，回到我的raw_input。我需要一个循环吗？

class stuff(Scene):

    def enter(self):
        print "This is text"
        print "This is text"
        print "This is text"
        print "This is text"
        print "This is text"

        action = raw_input("> ")

        if action == "blah"
            print "This is text"
            return 'stuff'

当我这样做时，它会重复我所有的打印行，如何让它返回到raw_input？

Answer 1

您可以为类创建一个属性，以跟踪您以前是否打印过文本。打印文本时，适当地设置属性。例如：

class stuff(Scene):
    def __init__(self):
        self.seen_description = False
        #other initialization goes here

    def enter(self):
        print "End Of The Road"
        if not self.seen_description:
            print "You are standing beside a small brick building at the end of a road from the north."
            print "A river flows south."
            print "To the north is open country, and all around is dense forest."
            self.seen_description = True

        action = raw_input("> ")

        if action == "go inside":
            print "You enter the brick building"
            return 'brick building'

x = stuff()
x.enter()
x.enter()

结果：

End Of The Road
You are standing beside a small brick building at the end of a road from the north.
A river flows south.
To the north is open country, and all around is dense forest.
> wait
End Of The Road
> wait

在这里，我们在第一次调用enter时得到了一个扩展描述，并且在所有后续调用中都跳过了它。