python mysql API

一、環境準備

• mysql安裝 https://mp.csdn.net/postedit/81771687
• 下載依賴包 pip3 install pymysql

二、接口調用

以下羅列兩種實現方式，第一種是原生的；第二種就是集成pandas的，用起來很方便，就跟mybatis一樣。

第一種：

• configuration.properties 

[SQL]
sql_host:172.8.10.xx
sql_port:3306
sql_db:xx
sql_username:xx
sql_password:xx

• MysqlClient 

#!/usr/bin/python3
# -*- coding: UTF-8 -*-

import json
import pymysql

config=ConfigParser()
config.read(str(config_file['configPath'].iloc[0]))

# =============================================================================
# initialization
# =============================================================================

SQL_host = config.get('SQL', 'SQL_host')
SQL_port = config.getint('SQL', 'SQL_port')
SQL_username = config.get('SQL', 'SQL_username')
SQL_password = config.get('SQL', 'SQL_password')
SQL_db = config.get('SQL', 'SQL_db')

class MysqlClient:

    def __init__(self):

        self.connection = pymysql.Connect(host=SQL_host, port=SQL_port,
                                          user=SQL_username, passwd=SQL_password,
                                          db=SQL_db, charset='utf8')
        self.cursor = self.connection.cursor()

    def insert(self, query):
        try:
            self.cursor.execute(query)
            self.connection.commit()
        except Exception as e:
            # self.connection.rollback()
            raise Exception(e)
        finally:
            self.cursor.close()
            self.connection.close()

    def query(self, query):
        try:
            cursor = self.connection.cursor(pymysql.cursors.DictCursor)
            cursor.execute(query)
            return cursor.fetchall()
        except Exception as e:
            raise Exception(e)
        finally:
            self.cursor.close()
            self.connection.close()

第二種：

#!/usr/bin/python3
# -*- coding: UTF-8 -*-

import json
import pandas as pd

conn_Mysql = create_engine("mysql+pymysql://{SQL_username}:{SQL_password}@{SQL_host}:{SQL_port}/{SQL_db}".format(
    SQL_username=SQL_username, SQL_password=SQL_password,
    SQL_host=SQL_host, SQL_port=SQL_port, SQL_db=SQL_db))

案例：

 sql_query = '''select alarm_time from xx
        where machine_id={mid} and spindle_name={sid}
        and cutter_location_name={tn} and program_no="{pn}"
        '''.format(mid=machineID, sid=spindleID, tn=toolNum, pn=programNum)

        histAlarmTime = pd.read_sql(sql_query, conn_Mysql)