Question

请告诉我是否发现可能的错误？

import requests
try:
    req = requests.get('http://google.com')
except FileNotFoundError  as exc:
    print('Error open url. ', exc)

或FileNotFoundError仅适用于文件系统中的文件？在这种情况下，我仍然使用上述代码的什么类型的异常？

Answer 1

Here是requests库引发的异常列表。 FileNotFoundError不在其中。

您应该执行以下操作：

import requests

try:
    req = requests.get('http://google.com')
except requests.exceptions.HTTPError as exc:
    print('HTTP error', exc)

您可以根据需要捕捉其他例外情况：

Python 3.3.2+ (default, Oct  9 2013, 14:50:09) 
>>> import requests
>>> requests.get('googleeeeeeee2323235.com')
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
    ...
    "Perhaps you meant http://{0}?".format(url))
requests.exceptions.MissingSchema: Invalid URL 'googleeeeeeee2323235.com': No schema supplied. Perhaps you meant http://googleeeeeeee2323235.com?
>>> requests.get('http://googleeeeeeee2323235.com')
Traceback (most recent call last):
  ...
  File "/usr/lib/python3.3/socket.py", line 417, in create_connection
    for res in getaddrinfo(host, port, 0, SOCK_STREAM):
socket.gaierror: [Errno -2] Name or service not known

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
    ...
    raise MaxRetryError(self, url, e)
requests.packages.urllib3.exceptions.MaxRetryError: HTTPConnectionPool(host='googleeeeeeee2323235.com', port=80): Max retries exceeded with url: / (Caused by <class 'socket.gaierror'>: [Errno -2] Name or service not known)

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
    ...
    raise ConnectionError(e)
requests.exceptions.ConnectionError: HTTPConnectionPool(host='googleeeeeeee2323235.com', port=80): Max retries exceeded with url: / (Caused by <class 'socket.gaierror'>: [Errno -2] Name or service not known)
>>>

因此，如果主机未知，您应该抓住requests.exceptions.ConnectionError。

或者您可能希望捕获所有requests例外的基本例外。查阅文档或源代码以了解它是什么。

如何显示错误信息连接？

1 个答案: