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Dear you, this is The LearningYard Academy. Today Xiaobian brings you "Learn how much to know (python):list”, welcome your visit.
一、定義
列表是最重要得python內(nèi)置對(duì)象之一,是包含若干元素得有序連續(xù)內(nèi)存空間。
I. Definitions
A list is one of the most important Python built-in objects, an ordered contiguous memory space containing several elements.
二、列表創(chuàng)建與刪除
使用“=”直接將一個(gè)列表賦值給變量
使用list()函數(shù)把元組、字符串、字典等轉(zhuǎn)換為列表
使用del命令將列表刪除
2. List creation and deletion
Use "=" to assign a list directly to a variable
Use the list() function to convert tuples, strings, dictionaries, etc. to lists
Use the del command to delete the list
三、列表常用方法
append(x)
將x追加至列表尾部
extend(L)
將列表L中得所有元素追加至列表尾部
insert(index,x)
在列表index處插入x,如果index為正數(shù)且大于列表長(zhǎng)度則在尾部追加x,如果index為負(fù)數(shù)且小于列表長(zhǎng)度得相反數(shù)則在列表頭部插入x。
remove(x)
在列表中刪除第壹個(gè)值為x得元素,如果不存在x則拋出異常
reverse()
對(duì)列表所有元素進(jìn)行原地排序,首尾交換
3. Common methods of listing
append(x)
Append x to the end of the list
extend(L)
Appends all elements in list L to the end of the list
insert(index,x)
Insert x at the list index, append x to the trailing if index is positive and greater than the list length, and insert x at the end if index is negative and less than the opposite of the list length.
remove(x)
Remove the first element with a value x in the list and throw an exception if x does not exist
reverse()
Sort all elements of the list in place, ending and swapping
四、案例
4. Cases
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清華大學(xué)出版 董付國(guó)《Python程序設(shè)計(jì)基礎(chǔ)》
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