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This is the third of the Python introductory tutorials, which will specifically describe the four types of data structures commonly used in Python, which are lists, tuples, collections, dictionaries, which are often used later, so you need to

Some of the functions defined within the list Append: Adds a new object at the end of the list.Function prototypes: def append (self, p_object)Usage: List1.append (P_object) Clear: Empty listFunction prototype: def

A list of basic knowledge:The list is defined by [] and can be appended and deleted by querying the index values.Common usage is as followsnames = [' Zhang ', ' Zhuang ', [' Alx ', ' Bob '], ' Chen ', ' Qiang ']print (len (names)) # Gets the list

One, string manipulation:name = ' Aabc,dddd,a 'name1 = ' Q '# print (name[3]) #字符串也可以取下标# Print (Name.capitalize ()) #把字符串首字母大写# Print (Name.center (one, ' * ')) #把name放中间, string less than 11, then complete with *# #print (Name.index (' P '))

I. What is a variable?In my understanding, the variable in the program is to create a space in memory, or you can think of variables as a container,The operation nature of the program is a series of state changes, and the variables of this container

1. Introduction to the JSON moduleJSON is a module of Python's own operation JSON. Data type conversion Relationships when Python is serialized as JSON: Python format JSON format Dict (composite type)

Full-text retrieval is a FULLTEXT index in MySQL. FULLTEXT indexes are used for MyISAM tables. You can use ALTERTABLE or CREATEINDEX to create indexes in CHAR, VARCHAR, or TEXT columns at or after CREATETABLE. Full-text retrieval is a FULLTEXT index

For large databases, it is very fast to load data to a TABLE without FULLTEXT indexes and then CREATE an INDEX using alter table (or create index. Loading data to a table with FULLTEXT indexes will be very slow.1. Prerequisites for using Mysql

For large databases, it is very fast to load data to a TABLE without FULLTEXT indexes and then CREATE an INDEX using alter table (or create index. Loading data to a table with FULLTEXT indexes will be very slow. 1. Prerequisites for using Mysql full-

For large databases, it is very quick to load the data into a table with no Fulltext index and then use ALTER table (or CREATE index) to create the index. It will be very slow to load data into a table that already has a fulltext index. 1.