Python切換到新master的腳本

看到有個不錯的切換master的腳本，python編寫的；可以自動切換到新master上的腳本，拿下來分享下；

def  replicate_to_position(server,pos):
server.sql("START SLAVE UNTIL MASTER_LOT_FILE=%s,MASTER_LOG_POS=%s",(pos.file,po
s.pos))
server.sql("SELECT MASTER_POS_WAIT(%s,%s)",(pos.file,pos.pos))
 
def  switch_to_master(server,standby)
      stop_slave(server)
      stop_slave(standby)
      server_pos = fetch_slave_position(server)
      standby_pos = fetch_slave_position(standby)
      if  server_pos < standby_pos:
          replicate_to_position(server,standby_pos)
      elif server_pos  > standby_pos:
          replicate_to_position(standby,server_pos)
      master_pos = fetch_master_positino(standby)
      change_master(server,standby,master_pos)
      start_slave(standby)
      start_slave(server)