Python——Mysql，,一、导入　　

Python——Mysql，,一、导入　　

一、导入　　

        import pymysql

二、连接

def connect_wxremit_db():    return pymysql.connect(host=‘10.123.5.28‘,                           port=3306,                           user=‘root‘,                           password=‘root1234‘,                           database=‘db_name‘,                           charset=‘latin1‘)‘‘‘hots:主机地址port:端口号user:用户password：密码database：数据库charset：表‘‘‘

三、查询

def query_country_name(cc2):    sql_str = ("SELECT Fcountry_name_zh"                + " FROM t_country_code"                + " WHERE Fcountry_2code=‘%s‘" % (cc2))    logging.info(sql_str)    con = mysql_api.connect_wxremit_db()    cur = con.cursor()    cur.execute(sql_str)    rows = cur.fetchall()    cur.close()    con.close()    assert len(rows) == 1, ‘Fatal error: country_code does not exists!‘    return rows[0][0]

四、插入

def insert_file_rec(self, file_name, file_md5):        con = mysql_api.connect_wxremit_db()        cur = con.cursor()        try:            sql_str = ("INSERT INTO t_forward_file (Ffile_name, Ffile_md5)",                        + " VALUES (‘%s‘, ‘%s‘)" % (file_name, file_md5))            cur.execute(sql_str)            con.commit()        except:            con.rollback()            logging.exception(‘Insert operation error‘)            raise        finally:            cur.close()            con.close()

五、批量插入

remit_ids = [(‘1234‘, ‘CAD‘), (‘5678‘, ‘HKD‘)]con = mysql_api.connect_wxremit_db()        cur = con.cursor()        try:                cur.executemany("INSERT INTO t_order (Fremit_id, Fcur_type, Fcreate_time"                                                + " VALUES (%s, %s, now())", new_items)                assert cur.rowcount == len(remit_ids), ‘my error message‘                con.commit()        except Exception as e:                con.rollback()                logging.exception(‘Insert operation error‘)        finally:                cur.close()                con.close()

六、更新

def update_refund_trans(self, remit_id):        con = mysql_api.connect_wxremit_db()        cur = con.cursor()        try:            sql_str = ("SELECT Fremit_id"                       + " FROM t_wxrefund_trans"                       + " WHERE Fremit_id=‘%s‘" % remit_id                       + " FOR UPDATE")            logging.info(sql_str)            cur.execute(sql_str)            assert cur.rowcount == 1, ‘Fatal error: The wx-refund record be deleted!‘            sql_str = ("UPDATE t_wxrefund_trans"                        + " SET Fcheck_amount_flag=1"                        + ", Fmodify_time=now()"                        + " WHERE Fremit_id=‘%s‘" % remit_id            logging.info(sql_str)            cur.execute(sql_str)            assert cur.rowcount == 1, ‘The number of affected rows not equal to 1‘            con.commit()        except:            con.rollback()            logging.exception(‘Update operation error‘)            raise        finally:            cur.close()            con.close()

Python——Mysql