解析对象内容
解析对象内容
提问于 2018-11-13 11:28:45
我试图解析测试服务器未启动时请求返回的错误。
print("%s\n" % type(error))
<class 'requests.exceptions.ConnectionError'>
print("%s\n" % error)
HTTPConnectionPool(host='localhost', port=8080): Max retries exceeded with url: /test_soap (Caused by NewConnectionError('<urllib3.connection.HTTPConnection object at 0x7fecf0892a90>: Failed to establish a new connection: [Errno 111] Connexion refusée'))打开/usr/lib/python3.7/site-packages/requests/exceptions.py时，可以看到ConnectionError类具有response和request属性：
print("%s\n" % error.response)
None
print("%s\n" % error.request)
<PreparedRequest [POST]>但是我想访问urllib3.connection.HTTPConnection对象，以便打印Failed to establish a new connection错误消息。
requests.exceptions.ConnectionError类是如何生成的，以便在打印它时显示此错误消息？
回答 1
Stack Overflow用户
回答已采纳
发布于 2018-11-13 11:42:28
TL；博士你不能。
至少不是很好。
好的是你不应该，或者至少你不需要。
考虑：
import requests
try:
requests.get('http://localhost')
except Exception as error:
print(error)
print(type(error))
print([o for o in dir(error) if not o.startswith('__')])输出
# HTTPConnectionPool(host='localhost', port=80): Max retries exceeded with url: / (Caused by NewConnectionError('<urllib3.connection.HTTPConnection object at 0x0000019F34649C18>: Failed to establish a new connection: [WinError 10061] No connection could be made because the target machine actively refused it'))
# <class 'requests.exceptions.ConnectionError'>
# ['args', 'characters_written', 'errno', 'filename',
# 'filename2', 'request', 'response',
# 'strerror', 'winerror', 'with_traceback']如果我们查看最后一个输出，除了args之外，没有什么东西真正突出。
print(error.args)与往常一样，这将是一个包含抛出对象的元组：
# (MaxRetryError("HTTPConnectionPool(host='localhost', port=80): Max retries exceeded with url: / (Caused by NewConnectionError('<urllib3.connection.HTTPConnection object at 0x00000189C4D7AD30>: Failed to establish a new connection: [WinError 10061] No connection could be made because the target machine actively refused it'))"),)从这里到底层的urlib3异常是丑陋和混乱的，并没有真正给我们任何我们还不知道的新信息：
print(error.args[0].reason.args[0])
# <urllib3.connection.HTTPConnection object at 0x0000023476C40390>: Failed to establish a new connection: [WinError 10061] No connection could be made because the target machine actively refused it页面原文内容由Stack Overflow提供。腾讯云小微IT领域专用引擎提供翻译支持
原文链接：
https://stackoverflow.com/questions/53280054
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