python基础编程_26_列表元素的插入,删除,排序

快来打我* 2022-05-28 02:26 250阅读 0赞

本文参考自《Python编程：从入门到实践》，作者：Eric Matthes，译者：袁国忠

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 <td style="margin:0px;padding:3px;border-color:#C0C0C0;border-collapse:collapse;text-align:center;">操作</td> 
 <td style="margin:0px;padding:3px;border-color:#C0C0C0;border-collapse:collapse;text-align:center;">语法</td> 
 <td style="margin:0px;padding:3px;border-color:#C0C0C0;border-collapse:collapse;text-align:center;">举例</td> 
 <td style="margin:0px;padding:3px;border-color:#C0C0C0;border-collapse:collapse;text-align:center;">结果</td> 
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 <td style="margin:0px;padding:3px;border-color:#C0C0C0;border-collapse:collapse;">修改元素</td> 
 <td style="margin:0px;padding:3px;border-color:#C0C0C0;border-collapse:collapse;">&nbsp;</td> 
 <td style="margin:0px;padding:3px;border-color:#C0C0C0;border-collapse:collapse;">motocycles = ['honda', 'yamaha', 'suzuki']print (motocycles)&nbsp;motocycles[0] = 'ducati'print (motocycles)</td> 
 <td style="margin:0px;padding:3px;border-color:#C0C0C0;border-collapse:collapse;">['honda', 'yamaha', 'suzuki']&nbsp;['ducati', 'yamaha', 'suzuki']</td> 
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 <td style="margin:0px;padding:3px;border-color:#C0C0C0;border-collapse:collapse;">添加元素&nbsp;</td> 
 <td style="margin:0px;padding:3px;border-color:#C0C0C0;border-collapse:collapse;">在列表末尾添加元素：append()</td> 
 <td style="margin:0px;padding:3px;border-color:#C0C0C0;border-collapse:collapse;">&nbsp;motocycles = ['honda', 'yamaha', 'suzuki']print (motocycles)&nbsp;motocycles.append('ducati')print (motocycles)&nbsp;</td> 
 <td style="margin:0px;padding:3px;border-color:#C0C0C0;border-collapse:collapse;">['honda', 'yamaha', 'suzuki']&nbsp;['honda', 'yamaha', 'suzuki',&nbsp;'ducati']</td> 
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 <td style="margin:0px;padding:3px;border-color:#C0C0C0;border-collapse:collapse;">在列表中插入元素：insert()</td> 
 <td style="margin:0px;padding:3px;border-color:#C0C0C0;border-collapse:collapse;">&nbsp;motocycles = ['honda', 'yamaha', 'suzuki']print (motocycles)&nbsp;motocycels.insert(0, 'ducati')print (motocycles)&nbsp;</td> 
 <td style="margin:0px;padding:3px;border-color:#C0C0C0;border-collapse:collapse;">['honda', 'yamaha', 'suzuki']&nbsp;['ducati', 'honda', 'yamaha', 'suzuki']</td> 
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 <td style="margin:0px;padding:3px;border-color:#C0C0C0;border-collapse:collapse;">删除元素&nbsp;&nbsp;</td> 
 <td style="margin:0px;padding:3px;border-color:#C0C0C0;border-collapse:collapse;">根据索引删除：del，无法继续使用</td> 
 <td style="margin:0px;padding:3px;border-color:#C0C0C0;border-collapse:collapse;">&nbsp;&nbsp;motocycles = ['honda', 'yamaha', 'suzuki']print (motocycles)&nbsp;del motocycles[1]print (motocycles)&nbsp;&nbsp;</td> 
 <td style="margin:0px;padding:3px;border-color:#C0C0C0;border-collapse:collapse;">['honda', 'yamaha', 'suzuki']&nbsp;['honda', 'suzuki']</td> 
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 <td style="margin:0px;padding:3px;border-color:#C0C0C0;border-collapse:collapse;">删除末尾的元素：pop()，可以继续使用也可以根据索引删除，如motocycles.pop(0)</td> 
 <td style="margin:0px;padding:3px;border-color:#C0C0C0;border-collapse:collapse;">&nbsp;motocycles = ['honda', 'yamaha', 'suzuki']print (motocycles)&nbsp;popped_motocycle = motocycles.pop()print (motocycles)print (popped_motocycle)&nbsp;&nbsp;</td> 
 <td style="margin:0px;padding:3px;border-color:#C0C0C0;border-collapse:collapse;">['honda', 'yamaha', 'suzuki']&nbsp;['honda', 'yamaha']&nbsp;suzuki&nbsp;</td> 
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 <td style="margin:0px;padding:3px;border-color:#C0C0C0;border-collapse:collapse;">不知道索引时，根据值删除元素：remove()，可以继续使用&nbsp;</td> 
 <td style="margin:0px;padding:3px;border-color:#C0C0C0;border-collapse:collapse;">&nbsp;motocycles = ['honda', 'yamaha', 'suzuki'， 'ducati']print (motocycles)&nbsp;too_expensive = 'ducati'motocycles.remove(too_expensive)print (motocycles)print (too_expensive)</td> 
 <td style="margin:0px;padding:3px;border-color:#C0C0C0;border-collapse:collapse;">&nbsp;['honda', 'yamaha', 'suzuki', 'ducati']&nbsp;['honda', 'yamaha', 'suzuki']&nbsp;ducati&nbsp;</td> 
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 <td style="margin:0px;padding:3px;border-color:#C0C0C0;border-collapse:collapse;">元素排序</td> 
 <td style="margin:0px;padding:3px;border-color:#C0C0C0;border-collapse:collapse;">永久性排序：sort()&nbsp;反方向排序：sort(reverse = True)</td> 
 <td style="margin:0px;padding:3px;border-color:#C0C0C0;border-collapse:collapse;">cars = ['bmw', 'audi', 'toyota', 'subaru']print (cars)&nbsp;cars.sort()print (cars)&nbsp;cars = ['bmw', 'audi', 'toyota', 'subaru']cars.sort(reverse = True)print (cars)</td> 
 <td style="margin:0px;padding:3px;border-color:#C0C0C0;border-collapse:collapse;">['bmw', 'audi', 'toyota', 'subaru']&nbsp;['audi', 'bmw', 'subaru', 'toyota']&nbsp;['toyota', 'subaru', 'bmw', 'audi']</td> 
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 <td style="margin:0px;padding:3px;border-color:#C0C0C0;border-collapse:collapse;">临时性排序：sorted()&nbsp;反方向排序：sorted(reverse = True)</td> 
 <td style="margin:0px;padding:3px;border-color:#C0C0C0;border-collapse:collapse;">cars = ['bmw', 'audi', 'toyota', 'subaru']print (cars)print (sorted(cars))print (cars)</td> 
 <td style="margin:0px;padding:3px;border-color:#C0C0C0;border-collapse:collapse;">['bmw', 'audi', 'toyota', 'subaru']&nbsp;['audi', 'bmw', 'subaru', 'toyota']&nbsp;['bmw', 'audi', 'toyota', 'subaru']&nbsp;</td> 
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 <td style="margin:0px;padding:3px;border-color:#C0C0C0;border-collapse:collapse;">永久性反转列表元素的排列顺序：reverse()</td> 
 <td style="margin:0px;padding:3px;border-color:#C0C0C0;border-collapse:collapse;">cars = ['bmw', 'audi', 'toyota', 'subaru']print (cars)&nbsp;cars.reverse()print (cars)&nbsp;cars.reverse()print (cars)</td> 
 <td style="margin:0px;padding:3px;border-color:#C0C0C0;border-collapse:collapse;">['bmw', 'audi', 'toyota', 'subaru']&nbsp;['subaru', 'toyota', 'audi', 'bmw']&nbsp;['bmw', 'audi', 'toyota', 'subaru']</td> 
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