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55 lines
1.5 KiB
HTML
55 lines
1.5 KiB
HTML
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<pre>
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DataFrame <code>animals</code>
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+-------------+--------+
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| Column Name | Type |
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+-------------+--------+
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| name | object |
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| species | object |
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| age | int |
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| weight | int |
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+-------------+--------+
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</pre>
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<p>编写一个解决方案来列出体重 <strong>严格超过 </strong> <code>100</code> 千克的动物的名称。</p>
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<p>按体重 <strong>降序</strong> 返回动物。</p>
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<p>返回结果格式如下示例所示。</p>
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<p> </p>
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<p><b>示例 1:</b></p>
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<pre>
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<b>输入：</b>
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DataFrame animals:
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+----------+---------+-----+--------+
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| name | species | age | weight |
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+----------+---------+-----+--------+
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| Tatiana | Snake | 98 | 464 |
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| Khaled | Giraffe | 50 | 41 |
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| Alex | Leopard | 6 | 328 |
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| Jonathan | Monkey | 45 | 463 |
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| Stefan | Bear | 100 | 50 |
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| Tommy | Panda | 26 | 349 |
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+----------+---------+-----+--------+
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<b>输出：</b>
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+----------+
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| name |
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+----------+
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| Tatiana |
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| Jonathan |
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| Tommy |
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| Alex |
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+----------+
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<b>解释：</b>
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所有体重超过 100 的动物都应包含在结果表中。
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Tatiana 的体重为 464，Jonathan 的体重为 463，Tommy 的体重为 349，Alex 的体重为 328。
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结果应按体重降序排序。</pre>
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<p> </p>
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<p>在 Pandas 中，<strong>方法链</strong> 允许我们在 DataFrame 上执行操作，而无需将每个操作拆分成单独的行或创建多个临时变量。</p>
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<p>你能用 <strong>一行</strong> 代码的方法链完成这个任务吗？</p>
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