python通过配置文件连接数据库

今天主要是通过读取配置文件(ini文件)获取数据库表的ip,端口,用户,密码,表名等,使用pysql来操作数据库,具体的ini配置文件的操作参见我另一篇博客:https://www.cnblogs.com/jiyanjiao-702521/p/9420343.html

详细代码如下:

　　

 import pymysql
 from config_parser import cconfigparser

 class connectMySQL(object):
     def  __init__(self,hostname,user,password,dbname,port):
         db_config = {
             'host': hostname,
              'port': port,
              'user': user,
              'password': password,
              'db': dbname
             }
         self.conn = pymysql.connect(**db_config)
     def get_cursor(self):
         return self.conn.cursor()

     def querydb(self,sqlstring):
         cursor = self.get_cursor()
         try:
             cursor.execute(sqlstring)
             results = cursor.fetchall()
             for row in results:
                 print(row)
         except:
             self.logger.error('Error:unable to fetch data')
 if __name__ == '__main__':

     cccon = cconfigparser('C:\\Users\\lenovo\\Desktop\\config.ini')
     host = cccon.get('db_config_CD','host')
     port = int(cccon.get('db_config_CD','port'))
     print('port',port)
     user = cccon.get('db_config_CD','user')
     password = cccon.get('db_config_CD','password')
     db = cccon.get('db_config_CD','db')

     sqlstring = 'select table_name from information_schema.tables where table_schema=\'jac\''
     c = connectMySQL(host, user, password, db, port)
     c_chendu = c.querydb(sqlstring)