python mysql database operations

1, the installation pymysql library

Pymysql install third-party libraries in python, installed by pip install pymysql command.

2, python mysql database Procedure

Establish a database connection, connect to the database connect
Create a cursor cursor
Executes the corresponding sql statement
Query to get the data

3, get two way query data

Method 1: Obtain a query data

　　= cur.fetchone data_one () # cursor name .fetchone ()

Second way: Get all the query data

　　= cur.fetchall the Data () # cursor name .fetchall ()

4, python mysql database operator specific code

Import pymysql 

# . 1, is connected to the database 
CON = pymysql.connect (Host = ' IP ' , 
                Port = 3306 , 
                User = ' Test ' , 
                password = ' Test ' , 
                Database = ' Future ' , 
                charset = ' UTF8 ' )
 # 2 creating a cursor cursor 
CUR = con.cursor ()
 # . 3, performing the sql statement corresponding to execute () 
sql = '* from Member SELECT ' 
# query to the data quantity 
RES = cur.execute (SQL)
 Print (RES)
 # . 4, the query to obtain data 
# Method a: obtaining a query data 
data_one = cur.fetchone ()
 Print (data_one )
 # method two: Get all inquiries data 
data = cur.fetchall ()
 Print (data)

5, pay attention

pymysql operate the database, transaction enabled by default, use con.commit () to commit the transaction, did not submit, then, the operation does not take effect.

6, a package own class mysql

purpose:

Easy to read data
The database is configured to extract the configuration file for easy management of test environment

import pymysql
from common.config import conf

class ReadMySQLData(object):
    def __init__(self):
        # 连接到数据库
        self.con = pymysql.connect(host=conf.get('mysql','host'),
                port=conf.getint('mysql','port'),
                user=conf.get('mysql','user'),
                passwordconf.get = ( ' MySQL ' , ' password ' ), 
                Database = conf.get ( ' MySQL ' , ' Database ' ), 
                charset = ' utf8 ' )
         # create a cursor 
        self.cur = self.con.cursor ()
     DEF find_one (Self, SQL):
         '' ' 
        to locate and return the first data is found, the data is returned tuple type 
        : SQL param: 
        : return: 
        ' '' 
        self.cur.execute (SQL) 
        self.con.commit()
        returnself.cur.fetchone ()
     DEF find_all (Self, SQL):
         '' ' 
        to locate and return all the data found, the data is returned tuple type 
        : SQL param: 
        : return: 
        ' '' 
        self.cur.execute (SQL ) 
        self.con.commit () 
        return self.cur.fetchall ()
     DEF Close (Self):
         '' ' 
        close the cursor, disconnect from the database 
        : return: 
        ' '' 
        self.cur.close () 
        self.con.close ()

python interface test -mysql database operations