python之RabbitMQ python 库检查状态

亲们， 我正在尝试检查出错的连接，并在发生这种情况时登录以发出警报。

credentials = pika.PlainCredentials(username, password) 
parameters = pika.ConnectionParameters( 
    credentials=credentials, 
    host='localhost', 
    port=tcpport, 
    virtual_host='/vhost') 
if pika.BlockingConnection(parameters): 
    log_error("RabbitMQ Accepts non-SSL Connections") 
else: 
    log_info("RabbitMQ Not accepting non-SSL connections") 

出于某种原因，这不起作用，并且正在吐出:

WARNING:pika.adapters.base_connection:Connection to 127.0.0.1:8080 failed: [Errno 111] Connection refused 
Traceback (most recent call last): 
  File "./rabbit_test.py", line 141, in <module> 
    main() 
  File "./rabbit_test.py", line 129, in main 
    check_non_ssl('username', 'password') 
  File "./rabbit_test.py", line 40, in check_non_ssl 
    if pika.BlockingConnection(parameters): 
  File "/usr/lib/python2.6/site-packages/pika/adapters/blocking_connection.py", line 107, in __init__ 
    super(BlockingConnection, self).__init__(parameters, None, False) 
  File "/usr/lib/python2.6/site-packages/pika/adapters/base_connection.py", line 62, in __init__ 
    on_close_callback) 
  File "/usr/lib/python2.6/site-packages/pika/connection.py", line 590, in __init__ 
    self.connect() 
  File "/usr/lib/python2.6/site-packages/pika/adapters/blocking_connection.py", line 206, in connect 
    if not self._adapter_connect(): 
  File "/usr/lib/python2.6/site-packages/pika/adapters/blocking_connection.py", line 275, in _adapter_connect 
    raise exceptions.AMQPConnectionError(1) 
pika.exceptions.AMQPConnectionError: 1 

我如何捕捉失败并发出警报并继续我的检查，而不是脚本中断？

谢谢!

请您参考如下方法:

您可以使用 try 和 except 代替将语句评估为 bool 值的 if/else 子句> 捕捉错误:

try: 
    pika.BlockingConnection(parameters) 
    log_error("RabbitMQ Accepts non-SSL Connections") 
except: # if the anything goes wrong, go here 
    log_info("RabbitMQ Not accepting non-SSL connections")