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leetcode-cn/problem (Chinese)/重塑数据：连结 [reshape-data-concatenate].html Normal file
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<pre>
DataFrame <code>df1</code>
+-------------+--------+
| Column Name | Type |
+-------------+--------+
| student_id | int |
| name | object |
| age | int |
+-------------+--------+
DataFrame <code>df2</code>
+-------------+--------+
| Column Name | Type |
+-------------+--------+
| student_id | int |
| name | object |
| age | int |
+-------------+--------+
</pre>
<p>编写一个解决方案，将两个&nbsp;DataFrames <b>垂直 </b>连接成一个&nbsp;DataFrame。</p>
<p>结果格式如下示例所示。</p>
<p>&nbsp;</p>
<p><strong class="example">示例 1：</strong></p>
<pre>
<strong>输入：
df1</strong>
+------------+---------+-----+
| student_id | name | age |
+------------+---------+-----+
| 1 | Mason | 8 |
| 2 | Ava | 6 |
| 3 | Taylor | 15 |
| 4 | Georgia | 17 |
+------------+---------+-----+
<strong>df2
</strong>+------------+------+-----+
| student_id | name | age |
+------------+------+-----+
| 5 | Leo | 7 |
| 6 | Alex | 7 |
+------------+------+-----+
<b>输出：</b>
+------------+---------+-----+
| student_id | name | age |
+------------+---------+-----+
| 1 | Mason | 8 |
| 2 | Ava | 6 |
| 3 | Taylor | 15 |
| 4 | Georgia | 17 |
| 5 | Leo | 7 |
| 6 | Alex | 7 |
+------------+---------+-----+
<strong>解释：
</strong>两个 DataFrame 被垂直堆叠，它们的行被合并。</pre>