Question

当我遍历我的 json 文件时，它没有显示最后一个

for i in range(len(data)):
    print(i)
    if data[i]["id"] == user.id and data[i]["infractionType"] == "Warning":
        print("removed")
        data.remove(data[i])

这是打印出来的

ready
0
removed
1
removed
2

Answer 1

根据评论中的建议，在遍历列表时删除元素并不是一个好主意。最简单的解决方法是在循环后移除元素。

toRemove = []
for i in range(len(data)):
print(i)
if data[i]["id"] == user.id and data[i]["infractionType"] == "Warning":
    print("removed")
    toRemove.append(i)
for i in toRemove:
    data.remove(data[i])

Answer 2

试试看：

index = 0
for i in range(len(data)):
    print(i)
    if data[index]["id"] == user.id and data[index]["infractionType"] == "Warning":
        print("removed")
        data.pop(0)
    else:
        index += 1

并检查它：

>>> a = [1, 2, 1, 3, 4, 5]
>>> len(a)
6
>>> a.remove(1)
>>> a
[2, 3, 4, 5]
>>> len(a)
4
# -------------------------------
>>> a = [1, 2, 1, 3, 4, 5]
>>> len(a)
6
>>> a.pop(0)
>>> a
[2, 1, 3, 4, 5]
>>> len(a)
5

discord.ext.commands.errors.CommandInvokeError：命令引发异常：IndexError：列表索引超出范围

2 个答案: