異常後如何繼續循環？

Question

我有一個代碼，其中im循環通過主機列表和附加連接到連接列表，如果有連接錯誤，我想跳過它並繼續與主機列表中的下一個主機。

繼承人什麼，我現在有：

def do_connect(self): 
    """Connect to all hosts in the hosts list""" 
    for host in self.hosts: 
     try: 
      client = paramiko.SSHClient() 
      client.set_missing_host_key_policy(paramiko.AutoAddPolicy()) 
      client.connect(host['ip'], port=int(host['port']), username=host['user'], timeout=2) 
     except: 
      pass 
      #client.connect(host['ip'], port=int(host['port']), username=host['user'], password=host['passwd']) 

     finally: 
      if paramiko.SSHException(): 
       pass 
      else: 
       self.connections.append(client) 

這並不正常工作，如果連接失敗，它只是一次又一次的循環，在同一臺主機永遠，直到它建立連接，我怎麼解決這個問題？

Answer 1

你自己的答案還是錯了不少分...

import logging 
logger = logging.getLogger(__name__) 

def do_connect(self): 
    """Connect to all hosts in the hosts list""" 
    for host in self.hosts: 
     # this one has to go outside the try/except block 
     # else `client` might not be defined. 
     client = paramiko.SSHClient() 
     try: 
      client.set_missing_host_key_policy(paramiko.AutoAddPolicy()) 
      client.connect(host['ip'], port=int(host['port']), username=host['user'], timeout=2) 

     # you only want to catch specific exceptions here 
     except paramiko.SSHException as e: 
      # this will log the full error message and traceback 
      logger.exception("failed to connect to %(ip)s:%(port)s (user %(user)s)", host) 

      continue 
     # here you want a `else` clause not a `finally` 
     # (`finally` is _always_ executed) 
     else: 
      self.connections.append(client) 

Answer 2

好吧，得到它的工作，我需要添加繼續，由馬克提及，還有以前，如果終於內部檢查總是返回true，所以這是固定的。

這裏是固定的代碼，這並不增加連接失敗後，通常繼續循環：

def do_connect(self): 
    """Connect to all hosts in the hosts list""" 
    for host in self.hosts: 
     try: 
      client = paramiko.SSHClient() 
      client.set_missing_host_key_policy(paramiko.AutoAddPolicy()) 
      client.connect(host['ip'], port=int(host['port']), username=host['user'], timeout=2) 
     except: 
      continue 
      #client.connect(host['ip'], port=int(host['port']), username=host['user'], password=host['passwd']) 

     finally: 
      if client._agent is None: 
       pass 
      else: 
       self.connections.append(client)