Python 操作MySQL详解及实例

pip install pymysql

pip install pymysql-x.x.x.tar.gz

import pymysql

def connect_wxremit_db():
  return pymysql.connect(host='10.123.5.28',
              port=3306,
              user='root',
              password='root1234',
              database='db_name',
              charset='latin1')

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]

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()

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()

 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()