Python rookie promotion 10 ---- database operations, python10 ----

Python rookie promotion 10 ---- database operations, python10 ----
Introduction to the release of python3 has received negative comments from many programmers, saying that it is unstable and incompatible. However, negative comments are negative comments. Since python3 has been released, it must be a trend, however, in python3.4, mysqldb using python2.7 can no longer connect to the mysql database, which is quite confusing. However, we can use pymysql to complete the task of connecting to mysql. The steps are as follows:

Serial number	Description
1	Go to github to download the pymysql installation package pymysql
2	Decompress the package to a drive letter.
3	Open the cmd window (in Windows) and run the command in the root directory of pymysql. python setup. py install
4	In the program, import pymysql
5	Start database connection

Database operation API documentation connection: http://legacy.python.org/dev/peps/pep-0249/

Example

# Import pymysql package import pymysqltry: # Get A database connection, note that if it is a UTF-8 type, you need to develop the database conn = pymysql. connect (host = 'localhost', user = 'root', passwd = '000000', port = 123456, charset = 'utf8') cur = conn. cursor () # obtain a cursor object cur.exe cute ("create database test15") # execute the corresponding SQL statement cur.exe cute ("USE test15 ") cur.exe cute ("create table users (id INT, name VARCHAR (18)") cur.exe cute ("insert into users VALUES (1, 'blog '), (2, 'csdn '), (3, 'net'), (4, 'a359680405') ") cur.exe cute (" SELECT * FROM users ") data = cur. fetchall () for row in data: print ('% s \ t % s' % row) cur. close () # close the cursor conn. commit () # submit any outstanding transactions to the database, and do not perform any operations on the database that does not support transactions. close () # close the connection to the database and release the database resource snapshot t Exception: print ("Exception occurred ")

To use python3.4 with django1.7.2, add the following code in the _ init _. py file of the site:

1 import pymysql2 pymysql.install_as_MySQLdb()

After completing the preceding steps, you can access mysql in django.

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