How to use and distinguish between lists and tuples in Python _python

One or two differences

List:

1. Can add list content append

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

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

4. You can query a list segment at the location of the entire list index

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

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

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

8. Can forward reverse sort reverse

9. You can sort by letter or number

10. Use bracket "[]" when defining the list

Note: in the list, if one of the two list segments is the same, whether using index or remove is the top-most-listed segment of the statistic

META Group:

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

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

3. Use parentheses when defining tuples "()"

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 >&G T;> 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 ', ', ', ', ', ', ', ', ', ', ' A ', ', ', ' e ', ', ' I ', ' s ', ', ', ', ' e ', ' a ', ' n ', #查看列表段所在的索引号, note here the statistics of Jack for the first Jack ID number >>> Name_list.index (' j Ack ') 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, note that the deletion here is the first Jack >>> name_list.remove (' Jack ') >>> name_list [' Sean ', ' Tom ', ' a  Dam ', ' Angelia ', ' Daisy ', ' Jack ', ' David ', ' H ', ' e ', ' l ', ' l ', ' o ', ', ', ' m ', ' y ', ', ' n ', ' A ', ' m ', ' e ', ', ' I ', ' s ', ', ', ', ' e ', ' a '] #对整个列表进行倒序 >>> name_list.reverse () >>> name_list [' A ', ' e ', ' s ', ', ', ', ', ', ', ', ' ', ' ', '], ' , ' e ', ' m ', ' a ', ' n ', ', ' y ', ' m ', ', ', ' o ', ' l ', ' l ', ' e ', ' H ', ' David ', ' Jack ', ' Daisy ', ' Angelia ', ' Adam ', ' Tom ', ' SE An '] #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 ', ', ', ', ' e ', ' a ', #对整个列表进行列表 The first letter of the paragraph is sorted >>> 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, The number of times the xiaohong appears within the tuple
>>> name_tuple.count (' xiaoming ')
2
>>> name_tuple.count (' Xiaohong ')
1
#查询xiaoming, Xiaohong, Xiaozhang ID number within a tuple
>>> 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 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 '}