Python Basics (List Class)

Lists (List Class)

Tip: All of the following methods are methods in the class, the first argument is self, and unity is not written.

The methods that are included are:

1, append (x) #将x添加到List末尾.

>>>list=[' a ']

>>>list.append (' B ')

>>>list

[' A ', ' B ']

2, Extend (L) #将表L附加到末尾, merge two lists.

>>>list=[' A ', ' B ']

>>>list2= [' C ', ' d ']

>>>list.extend (LIST2)

>>>list

[' A ', ' B ', ' C ', ' d ']

3, insert (i,x) #将元素x插入到 I this position.

>>>list.insert (0, ' test ')

[' Test ', ' a ', ' B ', ' C ', ' d ']

4, remove (x) #删除列表里第一个值为x的元素, if it does not exist, an error occurred

>>>list.remove (' test ')>>> cannot be a location

[' A ', ' B ', ' C ', ' d ']

5, Pop ([i]) #删除并返回位置为 element of I, if omitted, it means the last element stack is deleted: LIFO (LIFO)

>>> List.pop ()

' d '

>>> List

[' A ', ' B ', ' C ']

>>> List.pop (1)

' B '

>>> List

[' A ', ' C ']

6, index (i) #返回第一个值为x的元素的位置, if it does not exist, an error occurred

>>> List.index (' a ')

0

>>> list.index (' C ')

1

7, COUNT (x) #返回等于x的元素个数

>>> List

[' A ', ' C ', ' A ', ' a ', ' d ']

>>> list.count (' a ')

3

8, sort () #将List元素按照非递减排序, and a sort method is the sorted () function

>>> List.sort ()

>>> List

[' A ', ' a ', ' a ', ' C ', ' d ']

9, reverse () #将List元素反转排序

>>> List.reverse ()

>>> List

[' d ', ' C ', ' A ', ' a ', ' a ']

Next article

Dictionary (Dict Class)

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Python Basics (List Class)