python连接mysql进行查询

pymysql连接工具类 

import pymysql

'''
数据库连接工具类
'''

class MySQLConnection:
    def __init__(self, host, port, user, password, database):
        self.host = host
        self.port = port
        self.user = user
        self.password = password
        self.database = database
        self.conn = None
        self.cursor = None

    # 连接数据库
    def connect(self):
        self.conn = pymysql.connect(
            host=self.host,
            port=self.port,
            user=self.user,
            password=self.password,
            database=self.database,
            charset='utf8mb4'
        )
        self.cursor = self.conn.cursor()

    # 断开连接
    def disconnect(self):
        if self.conn:
            self.conn.close()

    # 查询
    def execute_query(self, sql):
        self.cursor.execute(sql)
        result = self.cursor.fetchall()
        return result

    #更新
    def execute_update(self, sql):
        self.cursor.execute(sql)
        self.conn.commit()
        return self.cursor.rowcount

    # 关闭驱动
    def close_cursor(self):
        if self.cursor:
            self.cursor.close()

查询数据类

'''
class CoverageProject(object):

    def __init__(self):
        pass

    def test(self):
        # mysql 连接对象
        connection = MySQLConnection('1.1.1.0', 3306, 'username', 'password', 'test')
        connection.connect()
        result = connection.execute_query('sql')
        
        # 直接打印查询出的数据
        for row in result:
            print(row)

        print('===========================================================')

        # 将查询出数据的key与value进行对应，再打印
        row_headers = [x[0] for x in connection.cursor.description]  # this will extract row headers
        for row in result:
            print(dict(zip(row_headers, row)))


if __name__ == '__main__':
    c = CoverageProject()
    c.test()

执行结果