The so-called list nesting means that a list contains other sub lists .
Application scenarios ：
To store class one 、 Two 、 Names of students in three classes , And the names of the students in each class are in a list .
Such as , This is a large list, which contains three small lists , Each small list is a class , According to the basic syntax of the list, each data is separated by a comma ：
name_list = [[' The small white ', ' indigo plant ', ' Xiaohong '], [' Wang Wu ', ' Li Si ', ' Zhang San '], ['Python', 'Java', 'Php']]step ：
First step ： Find the sub list containing a certain data according to the subscript
The second step ： From the list of words found , Then find the final desired data according to the subscript
Code experience ：
name_list = [[' The small white ', ' indigo plant ', ' Xiaohong '], [' Wang Wu ', ' Li Si ', ' Zhang San '], ['Python', 'Java', 'Php']]
print(name_list) # result [[' The small white ', ' indigo plant ', ' Xiaohong '], [' Wang Wu ', ' Li Si ', ' Zhang San '], ['Python', 'Java', 'Php']]
# Data query when the list is nested
# Get the first word list
print(name_list[0]) # result ：[' The small white ', ' indigo plant ', ' Xiaohong ']
# Get the second data in the first sub list ---- Think of the first word list as a list name, just write a subscript after it
print(name_list[0][1]) # result ： indigo plant Execution results as shown ：
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