Detailed explanation of the usage and differences between lists and tuples in Python

1. The difference between the two

List:

1. You can add list content append

2. You can count the number of times a certain list segment appears in the entire list count

3. You can insert a string and split each letter of the entire string as a list segment and append it to the list extedn

4. You can query the position index of a certain list segment in the entire list

5. You can insert a list segment at the specified position insert

6. You can delete the last list segment of the list pop

7. You can delete a list segment in the specified list remove

8. You can sort forward and reverse reverse

9. You can sort by letters or numbers sort

10. Use square brackets "[]" when defining a list

Note: In the list, if two list segments are the same, whether using index or remove, the top list segment will be counted

Tuple:

1. You can count the number of times a certain tuple segment appears in the entire tuple count

2. You can query the tuple number index of a certain tuple segment in the entire tuple

3. Use parentheses "()" when defining tuples

2. How to use the two

List

#定义列表
>>> name_list = ['sean','tom','jack','Angelia','Daisy','jack'] 
#查看定义的列表
>>> name_list
['sean', 'tom', 'jack', 'Angelia', 'Daisy', 'jack']
#增加david列表段
>>> name_list.append('david')
>>> name_list
['sean', 'tom', 'jack', 'Angelia', 'Daisy', 'jack', 'david']
#统计david列表段出现次数
>>> name_list.count('david')
1
>>> name_list.count('jack')
2
#使用extend向列表中增加列表段
>>> name_list.extend('Hello,My name is sean')
>>> name_list
['sean', 'tom', 'jack', 'Angelia', 'Daisy', 'jack', 'david', 'H', 'e', 'l', 'l', 'o', ',', 'M', 'y', ' ', 'n', 'a', 'm', 'e', ' ', 'i', 's', ' ', 's', 'e', 'a', 'n']
#查看列表段所在的索引号，注意这里统计的jack为第一个jack id号
>>> name_list.index('jack')
2
>>> name_list.index('tom')
1
#向索引号为2的地方插入Adam
>>> name_list.insert(2,'Adam')
>>> name_list
['sean', 'tom', 'Adam', 'jack', 'Angelia', 'Daisy', 'jack', 'david', 'H', 'e', 'l', 'l', 'o', ',', 'M', 'y', ' ', 'n', 'a', 'm', 'e', ' ', 'i', 's', ' ', 's', 'e', 'a', 'n']
#删除最后一个列表段
>>> name_list.pop()
'n'
>>> name_list
['sean', 'tom', 'Adam', 'jack', 'Angelia', 'Daisy', 'jack', 'david', 'H', 'e', 'l', 'l', 'o', ',', 'M', 'y', ' ', 'n', 'a', 'm', 'e', ' ', 'i', 's', ' ', 's', 'e', 'a']
#删除指定列表段，注意这里删除的是第一个jack
>>> name_list.remove('jack')
>>> name_list
['sean', 'tom', 'Adam', 'Angelia', 'Daisy', 'jack', 'david', 'H', 'e', 'l', 'l', 'o', ',', 'M', 'y', ' ', 'n', 'a', 'm', 'e', ' ', 'i', 's', ' ', 's', 'e', 'a']
#对整个列表进行倒序
>>> name_list.reverse()
>>> name_list
['a', 'e', 's', ' ', 's', 'i', ' ', 'e', 'm', 'a', 'n', ' ', 'y', 'M', ',', 'o', 'l', 'l', 'e', 'H', 'david', 'jack', 'Daisy', 'Angelia', 'Adam', 'tom', 'sean']
#对整个列表进行倒序
>>> name_list.reverse()
>>> name_list
['sean', 'tom', 'Adam', 'Angelia', 'Daisy', 'jack', 'david', 'H', 'e', 'l', 'l', 'o', ',', 'M', 'y', ' ', 'n', 'a', 'm', 'e', ' ', 'i', 's', ' ', 's', 'e', 'a']
#对整个列表进行列表段的首字母进行排序
>>> name_list.sort()
>>> name_list
[' ', ' ', ' ', ',', 'Adam', 'Angelia', 'Daisy', 'H', 'M', 'a', 'a', 'david', 'e', 'e', 'e', 'i', 'jack', 'l', 'l', 'm', 'n', 'o', 's', 's', 'sean', 'tom', 'y']
>>> 

tuple

#定义元组name_tuple
>>> name_tuple = ('xiaoming','xiaohong','xiaoli','xiaozhang','xiaoming')
>>> name_tuple
('xiaoming', 'xiaohong', 'xiaoli', 'xiaozhang', 'xiaoming')
#统计xiaoming、xiaohong在元组内出现的次数
>>> name_tuple.count('xiaoming')
2
>>> name_tuple.count('xiaohong')
1
#查询xiaoming、xiaohong、xiaozhang在元组内的id号
>>> name_tuple.index('xiaoming')
0
>>> name_tuple.index('xiaohong')
1
>>> name_tuple.index('xiaozhang')
3
>>> 
#尝试增加一个元组单元
>>> name_tuple.append('xiaowang')
Traceback (most recent call last):
File "<pyshell#49>", line 1, in <module>
name_tuple.append('xiaowang')
AttributeError: 'tuple' object has no attribute 'append'
>>> 

The elements of a tuple are immutable, and the elements of a tuple are mutable

>>> tuple_A = (1,2,{'k1':'v1'})
>>> for i in tuple_A:
... print i
... 
1
2
{'k1': 'v1'}
#更改元素
>>> tuple_A[2]['k1'] = 'v2'
>>> for i in tuple_A:
... print i
... 
1
2
{'k1': 'v2'}
>>>