urllib3连接失败是什么类型的异常？

Question

I have a section of code that gives me a urllib3 error when the IP address of the host it's connecting to is wrong, and also stops the App from starting up.

This connection attempt is in a view(not the main view), which I'm assuming is being called when the application starts up.

I want to write a try to check for this exception, however, the error doesn't mention what exception type it's seeing.

Q: What Exception type can I specify in the try to handle this error when then application starts up?

Error

Was unable to import app
Error: HTTPSConnectionPool(host='10.0.0.1', port=834): Max retries exceeded with url: /items (Caused by NewConnectionError(': Failed to establish a new connection: [Errno 113] No route to host',))

Thanks in advance.

Answer 1

Thanks @cricket_007

solved it by importing the exceptions for requests.

from requests.exceptions import ConnectionError

and then trigger in the try statement.

try:
    <<something>>
except ConnectionError:
    <<something>>

Answer 2

In answer to the question actually asked, you can find out the base class(es) of a Python class via its __bases__ tuple. For example,

>>> class MyZeroDivide( ZeroDivisionError):
...   pass
>>> z = MyZeroDivide()  # instance
>>> z.__class__        
<class '__main__.MyZeroDivide'>  # class
>>> z.__class__.__bases__
(<type 'exceptions.ZeroDivisionError'>,)  # base class(es)
>>> z.__class__.__bases__[0].__bases__
(<type 'exceptions.ArithmeticError'>,)    # up a level
>>> z.__class__.__bases__[0].__bases__[0].__bases__
(<type 'exceptions.StandardError'>,)      # up two levels