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Change Data Type 改變指定欄位的資料型別_Intro to Pandas

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題目敘述

題目會給定一個pandas DataFrame作為輸入，要求我們在原有的資料表上，將欄位grade的資料型別從原本的float變更為int整數型別。

題目的原文敘述

測試範例

Example 1:
Input:
DataFrame students:
+------------+------+-----+-------+
| student_id | name | age | grade |
+------------+------+-----+-------+
| 1          | Ava  | 6   | 73.0  |
| 2          | Kate | 15  | 87.0  |
+------------+------+-----+-------+
Output:
+------------+------+-----+-------+
| student_id | name | age | grade |
+------------+------+-----+-------+
| 1          | Ava  | 6   | 73    |
| 2          | Kate | 15  | 87    |
+------------+------+-----+-------+
Explanation: 
The data types of the column grade is converted to int.

grade欄位從原本的float浮點數​ 轉換為 int整數型別。