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53 lines
1.8 KiB
HTML
53 lines
1.8 KiB
HTML
<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>Write a solution to list the names of animals that weigh <strong>strictly more than</strong> <code>100</code> kilograms.</p>
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<p>Return the animals sorted by weight in <strong>descending order</strong>.</p>
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<p>The result format is in the following example.</p>
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<p> </p>
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<p><strong>Example 1:</strong></p>
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<pre>
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<strong>Input:</strong>
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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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<strong>Output:</strong>
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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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<strong>Explanation:</strong>
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All animals weighing more than 100 should be included in the results table.
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Tatiana's weight is 464, Jonathan's weight is 463, Tommy's weight is 349, and Alex's weight is 328.
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The results should be sorted in descending order of weight.</pre>
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<p> </p>
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<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>
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<p>Can you complete this task in just <strong>one line </strong>of code using method chaining?</p>
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