如何使用 Python 3 在 requests.get() 请求期间抑制 http.client 异常日志记录

Question

我正在使用 Python3 并使用以下代码发出请求：

      try:
        resp = self.s.get(url, proxies=self.proxies)
        return resp.text
    except ConnectTimeout:
        self.logger.exception('{}: connection timeout!'.format(self.name))
    except ConnectionError:
        self.logger.exception('{}: ConnectionError!'.format(self.name))
    except RemoteDisconnected:
        self.logger.exception('{}: RemoteDisconnected'.format(self.name))
    except MaxRetryError:
        self.logger.exception('{}: MaxRetryError'.format(self.name))
    except Exception as e:
        self.logger.exception(e)

如果我在 session().get(url, proxies=proxies) 期间遇到异常，我会在日志文件中得到以下信息：

2018-04-20 17:14:27 | RF5MR: ConnectionError!

Traceback (most recent call last):
  File "/opt/scripts/this-is-my-app/.venv/lib/python3.6/site-packages/urllib3/connectionpool.py", line 601, in urlopen
    chunked=chunked)
  File "/opt/scripts/this-is-my-app/.venv/lib/python3.6/site-packages/urllib3/connectionpool.py", line 387, in _make_request
    six.raise_from(e, None)
  File "<string>", line 2, in raise_from
  File "/opt/scripts/this-is-my-app/.venv/lib/python3.6/site-packages/urllib3/connectionpool.py", line 383, in _make_request
    httplib_response = conn.getresponse()
  File "/usr/lib/python3.6/http/client.py", line 1331, in getresponse
    response.begin()
  File "/usr/lib/python3.6/http/client.py", line 297, in begin
    version, status, reason = self._read_status()
  File "/usr/lib/python3.6/http/client.py", line 266, in _read_status
    raise RemoteDisconnected("Remote end closed connection without"
http.client.RemoteDisconnected: Remote end closed connection without response

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "/opt/scripts/this-is-my-app/.venv/lib/python3.6/site-packages/requests/adapters.py", line 440, in send
    timeout=timeout
  File "/opt/scripts/this-is-my-app/.venv/lib/python3.6/site-packages/urllib3/connectionpool.py", line 639, in urlopen
    _stacktrace=sys.exc_info()[2])
  File "/opt/scripts/this-is-my-app/.venv/lib/python3.6/site-packages/urllib3/util/retry.py", line 388, in increment
    raise MaxRetryError(_pool, url, error or ResponseError(cause))
urllib3.exceptions.MaxRetryError: HTTPSConnectionPool(host='www.thesite.com', port=443): Max retries exceeded with url: /asdzxcqwe/2058706 (Caused by ProxyError('Cannot connect to proxy.', RemoteDisconnected('Remote end closed connection without response',)))

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "/opt/scripts/this-is-my-app/fetcher.py", line 417, in make_request
    resp = self.s.get(url, proxies=self.proxies)
  File "/opt/scripts/this-is-my-app/.venv/lib/python3.6/site-packages/requests/sessions.py", line 521, in get
    return self.request('GET', url, **kwargs)
  File "/opt/scripts/this-is-my-app/.venv/lib/python3.6/site-packages/requests/sessions.py", line 508, in request
    resp = self.send(prep, **send_kwargs)
  File "/opt/scripts/this-is-my-app/.venv/lib/python3.6/site-packages/requests/sessions.py", line 640, in send
    history = [resp for resp in gen] if allow_redirects else []
  File "/opt/scripts/this-is-my-app/.venv/lib/python3.6/site-packages/requests/sessions.py", line 640, in <listcomp>
    history = [resp for resp in gen] if allow_redirects else []
  File "/opt/scripts/this-is-my-app/.venv/lib/python3.6/site-packages/requests/sessions.py", line 218, in resolve_redirects
    **adapter_kwargs
  File "/opt/scripts/this-is-my-app/.venv/lib/python3.6/site-packages/requests/sessions.py", line 618, in send
    r = adapter.send(request, **kwargs)
  File "/opt/scripts/this-is-my-app/.venv/lib/python3.6/site-packages/requests/adapters.py", line 502, in send
    raise ProxyError(e, request=request)
requests.exceptions.ProxyError: HTTPSConnectionPool(host='www.thesite.com', port=443): Max retries exceeded with url: /asdzxcqwe/2058706 (Caused by ProxyError('Cannot connect to proxy.', RemoteDisconnected('Remote end closed connection without response',)))

但我想得到的只是记录的字符串：

2018-04-20 17:14:27 | RF5MR：连接错误！

能否请您指出我的错误在哪里，我怎样才能隐藏那些异常文本并只获得我想要记录的那个？

非常感谢！

Answer 1

不要调用self.logger.exception，而是调用self.logger.error。

exception 记录消息和回溯。所有其他日志方法仅以特定于该方法的优先级记录消息。

见the documentation on the logging module。