mirror of
https://gitee.com/coder-xiaomo/leetcode-problemset
synced 2025-01-10 18:48:13 +08:00
53 lines
1.7 KiB
HTML
53 lines
1.7 KiB
HTML
<pre>
|
|
DataFrame <code>animals</code>
|
|
+-------------+--------+
|
|
| Column Name | Type |
|
|
+-------------+--------+
|
|
| name | object |
|
|
| species | object |
|
|
| age | int |
|
|
| weight | int |
|
|
+-------------+--------+
|
|
</pre>
|
|
|
|
<p>Write a solution to list the names of animals that weigh <strong>strictly more than</strong> <code>100</code> kilograms.</p>
|
|
|
|
<p>Return the animals sorted by weight in <strong>descending order</strong>.</p>
|
|
|
|
<p>The result format is in the following example.</p>
|
|
|
|
<p> </p>
|
|
<p><strong>Example 1:</strong></p>
|
|
|
|
<pre>
|
|
<strong>Input:</strong>
|
|
DataFrame animals:
|
|
+----------+---------+-----+--------+
|
|
| name | species | age | weight |
|
|
+----------+---------+-----+--------+
|
|
| Tatiana | Snake | 98 | 464 |
|
|
| Khaled | Giraffe | 50 | 41 |
|
|
| Alex | Leopard | 6 | 328 |
|
|
| Jonathan | Monkey | 45 | 463 |
|
|
| Stefan | Bear | 100 | 50 |
|
|
| Tommy | Panda | 26 | 349 |
|
|
+----------+---------+-----+--------+
|
|
<strong>Output:</strong>
|
|
+----------+
|
|
| name |
|
|
+----------+
|
|
| Tatiana |
|
|
| Jonathan |
|
|
| Tommy |
|
|
| Alex |
|
|
+----------+
|
|
<strong>Explanation:</strong>
|
|
All animals weighing more than 100 should be included in the results table.
|
|
Tatiana's weight is 464, Jonathan's weight is 463, Tommy's weight is 349, and Alex's weight is 328.
|
|
The results should be sorted in descending order of weight.</pre>
|
|
|
|
<p> </p>
|
|
<p>In Pandas, <strong>method chaining</strong> enables us to perform operations on a DataFrame without breaking up each operation into a separate line or creating multiple temporary variables. </p>
|
|
|
|
<p>Can you complete this task in just <strong>one line </strong>of code using method chaining?</p>
|