[bug][python] n-queens

[asagege]

请在提交 bug 之前先搜索

• [X] 我已经搜索过 issues，没有发现相同的 bug。

出错的题目链接

https://leetcode.com/problems/n-queens/

报错信息

Wrong Answer Runtime: 49 ms Case 1 Case 2 Input n = 4 Output [[[".","Q",".","."],[".",".",".","Q"],["Q",".",".","."],[".",".","Q","."]],[[".",".","Q","."],["Q",".",".","."],[".",".",".","Q"],[".","Q",".","."]]] Expected [[".Q..","...Q","Q...","..Q."],["..Q.","Q...","...Q",".Q.."]]

你是否愿意提交 PR 修复这个 bug？

• [X] 我愿意！