Python代码运行报IndexError: list assignment index out of range错误问询

报错根因 #

你初始化的word是没有任何元素的空列表，Python不允许对列表不存在的索引位置直接赋值，你写的word[0]=faseLetter试图给空列表的第0位赋值，自然就触发了IndexError: list assignment index out of range报错。

其他代码问题 #

除了这个报错点，你的代码还有多处逻辑和语法错误：

• randint只接收2个整数参数（起始值、结束值），你代码里chr(randint((66,68),(70,72),(74,78),(80,88),(90)))的传参方式完全不符合语法要求
• 循环内第一行firstLetter=word[letterNum]，letterNum取值是4~8，而循环刚开始的时候word只有1个元素，访问不存在的索引会再次触发越界报错
• 列表不能直接和字符串拼接，word=word+faseLetter写法错误，要么用word.append(faseLetter)，要么写成word = word + [faseLetter]

修正后可用代码 #

#all leter are MAG
#E->3 A->4 O->0 V->W I->2
#rand ASCII with ch
from random import randint, choice
letterNum=randint(4,8)
word=[]
if len(word)==0:
    faseLetter=chr(randint(65,90))
    # 替换索引赋值为append添加元素
    word.append(faseLetter)
    voc=['A','E','O','U','Y','I']
for i in range(letterNum):
    # 取当前列表最后一个元素作为判断依据
    firstLetter=word[-1]
    randomChangeMaker=randint(1,2)
    if firstLetter in voc:
        # 随机选非元音的大写字母
        consonants = [c for c in range(65,91) if chr(c) not in voc]
        faseLetter=chr(choice(consonants))
        if faseLetter == 'W' and randomChangeMaker == 2:
            faseLetter='V'
    else:
        faseLetter=chr(randint(65,90))
        if faseLetter == 'E' and randomChangeMaker == 2:
            faseLetter='3'
        elif faseLetter == 'A' and randomChangeMaker == 2:
            faseLetter='4'
        elif faseLetter == 'O' and randomChangeMaker == 2:
            faseLetter='0'
        elif faseLetter == 'V' and randomChangeMaker == 2:
            faseLetter='W'
        elif faseLetter == 'W' and randomChangeMaker == 2:
            faseLetter='V'
        elif faseLetter == 'I' and randomChangeMaker == 2:
            faseLetter='2'
    word.append(faseLetter)
# 把列表转成字符串输出
print(''.join(word))

内容的提问来源于stack exchange，提问作者kiRaKilL