indexError out of range 当不应该的时候

Question

我有一长串代码打印了一堆图形符号，我刚开始遇到索引超出范围错误。它在函数内部，这是重要的代码：

在顶部，导入后（fr termcolor cprint，彩色，时间，os，随机）

rannum = random.randrange(1,20,1)

函数：

def obstacle():
    rocknum = random.randrange(0,12,1)
    rock = ["on_cyan","on_cyan","on_cyan","on_cyan","on_cyan","on_cyan","on_cyan","on_cyan","on_cyan","on_cyan","on_cyan","on_cyan"]
    rock[rocknum]= "on_cyan"
    ongroundls = [" "," "," "," "," "," "," "," "," "," "," "," "," "," "," "," "," "," "," "," "," "," "," "," "," "," "," "," "," "," "," "," "] #runframe 1  list
    pos = rannum
    #print(rannum)
    if rannum == random.randrange(0,20,1):
        #print(rannum, pos)
        ongroundls[rannum] = "4"
        rock[rocknum] = "on_yellow"
    else:
        rock[rocknum] = "on_cyan"
        #print(colored(ongroundls[0],"grey","on_cyan")+colored(ongroundls[1],"grey","on_cyan")+colored(ongroundls[2],"grey","on_cyan")+colored(ongroundls[3],"grey","on_cyan")+colored(ongroundls[4],"grey","on_cyan")+colored(ongroundls[5],"grey","on_cyan")+colored(ongroundls[6],"grey","on_cyan")+colored(ongroundls[7],"grey","on_cyan")+colored(ongroundls[8],"grey","on_cyan")+colored(ongroundls[9],"grey","on_cyan")+colored(ongroundls[10],"grey","on_cyan")+colored(ongroundls[11],"grey","on_cyan")+colored(ongroundls[12],"grey","on_cyan")+colored(ongroundls[13],"grey","on_cyan")+colored(ongroundls[14],"grey","on_cyan")+colored(ongroundls[15],"grey","on_cyan")+colored(ongroundls[16],"grey","on_cyan")+colored(ongroundls[17],"grey","on_cyan")+colored(ongroundls[18],"grey","on_cyan")+colored(ongroundls[19],"grey",rock[0])+colored(ongroundls[20],"grey",rock[1])+colored(ongroundls[21],"grey",rock[2])+colored(ongroundls[22],"grey",rock[3])+colored(ongroundls[23],"grey",rock[4])+colored(ongroundls[24],"grey",rock[5])+colored(ongroundls[25],"grey",rock[6])+colored(ongroundls[26],"grey",rock[7])+colored(ongroundls[27],"grey",rock[8])+colored(ongroundls[28],"grey",rock[9])+colored(ongroundls[29],"grey",rock[10])+colored(ongroundls[30],"grey",rock[11])+colored(ongroundls[31],"grey",rock[12]))
    while pos > 19:
        ongroundls[pos] = "#"
        pos - 1
        if pos == random.randrange(0, 32, 1):
            pos == random
        print(colored(ongroundls[0],"grey","on_cyan")+colored(ongroundls[1],"grey","on_cyan")+colored(ongroundls[2],"grey","on_cyan")+colored(ongroundls[3],"grey","on_cyan")+colored(ongroundls[4],"grey","on_cyan")+colored(ongroundls[5],"grey","on_cyan")+colored(ongroundls[6],"grey","on_cyan")+colored(ongroundls[7],"grey","on_cyan")+colored(ongroundls[8],"grey","on_cyan")+colored(ongroundls[9],"grey","on_cyan")+colored(ongroundls[10],"grey","on_cyan")+colored(ongroundls[11],"grey","on_cyan")+colored(ongroundls[12],"grey","on_cyan")+colored(ongroundls[13],"grey","on_cyan")+colored(ongroundls[14],"grey","on_cyan")+colored(ongroundls[15],"grey","on_cyan")+colored(ongroundls[16],"grey","on_cyan")+colored(ongroundls[17],"grey","on_cyan")+colored(ongroundls[18],"grey","on_cyan")+colored(ongroundls[19],"grey",rock[0])+colored(ongroundls[20],"grey",rock[1])+colored(ongroundls[21],"grey",rock[2])+colored(ongroundls[22],"grey",rock[3])+colored(ongroundls[23],"grey",rock[4])+colored(ongroundls[24],"grey",rock[5])+colored(ongroundls[25],"grey",rock[6])+colored(ongroundls[26],"grey",rock[7])+colored(ongroundls[27],"grey",rock[8])+colored(ongroundls[28],"grey",rock[9])+colored(ongroundls[29],"grey",rock[10])+colored(ongroundls[30],"grey",rock[11])+colored(ongroundls[31],"grey",rock[12]))

在while循环中（缓冲区只是一个小延迟和一个os.system('cls')

    obstacle()
    buffer()
    rannum = random.randrange(1,20,1)

它工作正常，然后我做了一些小改动，但我似乎无法修复它。我试过改变随机数，为了修复它，有些东西被注释掉了。，所以数字不是问题开始时的数字。我能做些什么来修复它？

Answer 1

你的问题是最后一行。您在 print 末尾硬编码了 rock[12]，但 rock 只有 12 个元素，因此最后一个有效索引是 11.

正如我在评论中指出的那样，即使您修复了此问题，代码也会变得乏味；您的 while 循环将永远不会运行，或者永远不会退出，因为您永远不会在循环内更改 pos（pos - 1 计算一个新值，但从不存储它；pos -= 1 可能是意图）。

indexError out of range 当不应该的时候

indexError out of range when there should not be

python

function

list

termcolor