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2885. 重命名列

English Version

题目描述

DataFrame students
+-------------+--------+
| Column Name | Type   |
+-------------+--------+
| id          | int    |
| first       | object |
| last        | object |
| age         | int    |
+-------------+--------+

编写一个解决方案，按以下方式重命名列：

• id 重命名为 student_id
• first 重命名为 first_name
• last 重命名为 last_name
• age 重命名为 age_in_years

返回结果格式如下示例所示。

 

示例 1:

输入：
+----+---------+----------+-----+
| id | first   | last     | age |
+----+---------+----------+-----+
| 1  | Mason   | King     | 6   |
| 2  | Ava     | Wright   | 7   |
| 3  | Taylor  | Hall     | 16  |
| 4  | Georgia | Thompson | 18  |
| 5  | Thomas  | Moore    | 10  |
+----+---------+----------+-----+
输出：
+------------+------------+-----------+--------------+
| student_id | first_name | last_name | age_in_years |
+------------+------------+-----------+--------------+
| 1          | Mason      | King      | 6            |
| 2          | Ava        | Wright    | 7            |
| 3          | Taylor     | Hall      | 16           |
| 4          | Georgia    | Thompson  | 18           |
| 5          | Thomas     | Moore     | 10           |
+------------+------------+-----------+--------------+
解释：
列名已相应更换。

解法

方法一

import pandas as pd


def renameColumns(students: pd.DataFrame) -> pd.DataFrame:
    students.rename(
        columns={
            'id': 'student_id',
            'first': 'first_name',
            'last': 'last_name',
            'age': 'age_in_years',
        },
        inplace=True,
    )
    return students