How to use and distinguish between lists and tuples in Python

One or two differences

List:

1. You can add the contents of the list append

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

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

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

5. You can insert a list segment at a specified location

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

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

8. You can reverse sort reverse

9. Sort by letter or number

10. When defining a list, use the brackets "[]"

Note: In the list, if two list segments are the same, whether you use index or remove is the top-most list segment of the statistic

Meta-group:

1. You can count the number of occurrences of a tuple segment in an entire tuple

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

3. Defining tuples with parentheses "()"

Two or two ways to use them

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 ') use extend to add list segments to the list >>> 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, note that Jack here counts for the first Jack ID number >>> Name_list.index ( ' Jack ') 2>>> Name_list.index (' Tom ') insert Adam>>> Name_list.insert (2, ' Adam ') in place of index number 2 >>>  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Last list Segment >>> 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, note this Removed is the first 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  Line reverse >>> 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 ']>>>

Meta-group

#定义元组name_tuple >>> name_tuple = (' xiaoming ', ' xiaohong ', ' Xiaoli ', ' Xiaozhang ', ' xiaoming ') >>> name_ Tuple (' xiaoming ', ' xiaohong ', ' Xiaoli ', ' Xiaozhang ', ' xiaoming ') #统计xiaoming, xiaohong occurrences within tuples >>> name_ Tuple.count (' xiaoming ') 2>>> name_tuple.count (' Xiaohong ') # query Xiaoming, xiaohong, Xiaozhang ID numbers within tuples > >> 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 have no Attribute ' append ' >>>

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

>>> tuple_a = (1,2,{' k1 ': ' v1 ') >>> for i in tuple_a: ... print I ... 12{' K1 ': ' v1 '} #更改元素 >>> tuple_a[2][' k1 '] = ' v2 ' >>> for i in tuple_a: ... print I ... 12{' K1 ': ' V2 '}>>>