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Python-列表中的索引错误

[英]Python - index error in list

我正在编写一个程序,它接受一个输入2的第一个方向,第二个是一行,我通过使用split('')来执行此操作,所有这些输入都在while循环中输入,但是用户不想输入更多的输入,他只是输入空行并终止,但是没有发生,不知道为什么...这是我的代码

while True:
movement = input().split(' ')
direction = movement[0].lower()
step = int(movement[1])
if movement != '' or movement != 0:

    if direction == 'up' or direction == 'down':
        if y == 0:
            if direction == 'down':
                y -= step
            else:
                y += step
        else:
            if direction == 'down':
                y -= step
            else:
                y += step
    elif direction == 'left' or direction == 'right':
        if x == 0:
            if direction == 'right':
                x -= step
            else:
                x += step
        else:
            if direction == 'right':
                x -= step
            else:
                x += step
else:
    current = (x, y)
    print(original)
    print(current)
    break

但我输入银行输入会显示此消息

 Traceback (most recent call last):
 File "C:/Users/Zohaib/PycharmProjects/Python Assignments/Question_14.py", 
 line 04, in <module>
 step = int(movement[1])
 IndexError: list index out of range

您可以对列表进行len()处理,如果不作任何动作,就可以进行逻辑运算,例如

if len(movement) == 0:
    # Your logic when you don't have any input
    pass
else:
    # Your logic when you have at least one input
    pass

将您的direction = moving [0] .lower()行移至if语句中,这将使它们仅在运动!=时才运行,您需要更改if语句o否则它将始终为true不能同时为”和0

同样,将拆分也移动到if语句中,以便在if语句中进行比较时,只需比较移动即可。 (“'.split()返回[])

while True:

    movement = input()
    if movement != '' and movement != '0':
        movement = movement.split()
        direction = movement[0].lower()
        step = int(movement[1])
        del movement[1]
        if direction == 'up' or direction == 'down':
            if y == 0:
                if direction == 'down':
                    y -= step
                else:
                    y += step
            else:
                if direction == 'down':
                    y -= step
                else:
                    y += step
        elif direction == 'left' or direction == 'right':
            if x == 0:
                if direction == 'right':
                    x -= step
                else:
                    x += step
            else:
                if direction == 'right':
                    x -= step
                else:
                    x += step
    else:
        current = (x, y)
        print(original)
        print(current)
        break

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