Sockets 如果未连接，如何退出服务器连接

我有两台服务器，我的客户端希望向这两台服务器发送相同的数据。但如果server1无法连接，客户端程序将等待，而server2无法获取数据。我想等待服务器1 1s，如果它无法连接，那么服务器2将获取数据

import socket               
s1 = socket.socket()     
s2 = socket.socket()   
host1 = '192.168.0.3'
port1 = 12345
host2 = '192.168.0.5'
port2=12321               
s1.connect((host1, port1))
s1.send(data)
s2.connect((host2,port2))
s2.send(data)
s1.close()
s2.close()

---

我认为，如果您无法连接到服务器，它将自动抛出异常。如果您捕获到异常，将执行以下行。
例如：-
客户端

import socket
import struct, time
import sys
# server
HOST = "localhost"
PORT = 13

# reference time (in seconds since 1900-01-01 00:00:00)
TIME1970 = 2208988800L # 1970-01-01 00:00:00

# connect to server
s = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
s2 = socket.socket(socket.AF_INET, socket.SOCK_STREAM)

try:
     s.connect((HOST, PORT))
except: # catch *all* exceptions
      e = sys.exc_info()[0]
      print(e)

try:
     s2.connect((HOST, 8037))
except: # catch *all* exceptions
      e = sys.exc_info()[0]



# read 4 bytes, and convert to time value
t = s2.recv(4)
t = struct.unpack("!I", t)[0]
t = int(t - TIME1970)

s.close()

# print results
print "server time is", time.ctime(t)
print "local clock is", int(time.time()) - t, "seconds off"

服务器端

import socket
import struct, time

# user-accessible port
PORT = 8037

# reference time
TIME1970 = 2208988800L

# establish server
service = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
service.bind(("", PORT))
service.listen(1)

print "listening on port", PORT

while 1:
    # serve forever
    channel, info = service.accept()
    print "connection from", info
    t = int(time.time()) + TIME1970
    t = struct.pack("!I", t)
    channel.send(t) # send timestamp
    channel.close() # disconnect

在上面的客户机代码中，一个服务器端口没有退出，即localhost:13，因此它将引发异常，我捕获到异常，然后执行错误代码后的代码连接到服务器localhost:8037，并返回数据。

只需添加try即可

try:
   s1.connect((host1, port1))
   s1.send(data)
except:
   print " s1 not connected"
try:
   s2.connect((host2,port2))
   s2.send(data)
except:
   print"s2 not connected"
s1.close()
s2.close()

---

先生，即使服务器出现故障或未连接，或发生任何其他错误，我也要执行rest程序。如果我设置timeout（），它将显示timedout。或者正在生成错误消息。请给我举个例子