如何解决ValueError：不在列表中

Question

虽然实际上在列表中，但我在这里遇到同样的问题。可能还有另一个错误，是我的代码检查它，请：

base = ["a","b","c","d","e","f","g","h","i","j","k","l","m","n","o","p","q","r","s","t","u","v","w","x","y","z"]
c= base.index(a)

a是输入，我确保它是“ o”，“ k”

ValueError: ['o', 'k'] is not in list

此外，我不能放try:，因为必须完成这一行，或者整个程序无法正常工作

Answer 1

您可以像这样尝试给定输入中的每个字母， 输入：

ip = ["o", "k"]
c = (base.index(i) for i in ip)

输出：

for i in c:
...     print(i)
...
14
10

Answer 2

“基本”似乎不是列表列表。

代替：

if ['o','k'] in list:

您应该使用：

if 'o' in list and 'k' in list: