Question

我收到错误IndexError：列表索引超出范围。我想把字典数据放到模型（用户）。我写了

book2 = xlrd.open_workbook('./data/excel1.xlsx')
sheet2 = book2.sheet_by_index(0)
for row_index in range(1,sheet2.nrows):
    rows = sheet2.row_values(row_index)
    print(rows)
    user3 = User.objects.filter(user_id=rows[0])
    if user3:
        user3.update(talk1=rows[2],characteristic1=rows[3],talk2=rows[4],characteristic2=rows[5],
                     talk3=rows[6], characteristic3=rows[7],talk4=rows[8], characteristic4=rows[9],
                     talk5=rows[10], characteristic5=rows[11],talk6=rows[12], characteristic6=rows[13],
                     talk7=rows[14], characteristic7=rows[15], talk8=rows[16], characteristic8=rows[17])

但是，行的索引数与每个list.rows类似

['001200cd3eF', 'Tom', 'Hi', 'greeting', 'Goodmorning', 'greeting', 'Bye' 'say good‐bye', '', '', '']['007700ab7Ws', 'Blear', 'How are you', 'greeting', 'Thx', 'Thanks', '', '', '']

所以每个列表的索引数不同，max index为13。 models.py是

Class User(models.Model):
    talk1 = models.CharField(max_length=500,null=True)
    talk2 = models.CharField(max_length=500, null=True)
    talk3 = models.CharField(max_length=500, null=True)
    talk4 = models.CharField(max_length=500, null=True)
    talk5 = models.CharField(max_length=500, null=True)
    talk6 = models.CharField(max_length=500, null=True)
    talk7 = models.CharField(max_length=500, null=True)
    talk8 = models.CharField(max_length=500, null=True)
    characteristic1 = models.CharField(max_length=500,null=True)
    characteristic2 = models.CharField(max_length=500, null=True)
    characteristic3 = models.CharField(max_length=500, null=True)
    characteristic4 = models.CharField(max_length=500, null=True)
    characteristic5 = models.CharField(max_length=500, null=True)
    characteristic6 = models.CharField(max_length=500, null=True)
    characteristic7 = models.CharField(max_length=500, null=True)
    characteristic8 = models.CharField(max_length=500, null=True)

如果列表没有值，我想把null。我该怎么解决这个问题？我该怎么写呢？

Answer 1

与字典不同，没有安全的方法来访问列表中可能不存在的索引。

在你的例子中，我理解在某些行中你不会有索引16,17等......

我建议你看一下这个答案：https://stackoverflow.com/a/5125636/3620496

在user3.update()中，您可以safe_list_get(rows, index_you_want, 'Default Value you want')

替换所有列表访问权限

看看这些答案，他们都可以给出一些答案元素：Getting a default value on index out of range in Python

Answer 2

你可以像索引错误一样处理那个列表，你可以添加额外的索引值为空值

rows=sheet2.row_values(row_index)
append_empty  = ['','','','',''] #here mention how many empty index as you need
rows = rows + append_empty
#goes to your update logic

IndexError：列表索引超出范围：我可以理解为什么会发生此错误

2 个答案: