How to get which attribute causes the AttributeError except inspecting strings?

Newsgroups	comp.lang.python
Date	2016-03-07 00:46 -0800
Message-ID	<be90a047-38ea-4108-adb8-17fd7483fee5@googlegroups.com> (permalink)
Subject	How to get which attribute causes the AttributeError except inspecting strings?
From	ZhangXiang <zhangyangyu0614@gmail.com>

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In python3, when I write code like this:

try:
    fields = [getattr(Product, field) for field in fields.split(',')]
except AttributeError as e:
    raise HTTPError(...)

I want to raise a new type of error giving a string telling the user which attribute is not valid. But I don't see any method I can use to get the attribute name except inspecting e.args[0].

Could anyone give me a hint? Maybe I miss something. 

By the way, I don't quite want to change my code to a for-loop so I can access the field variable in exception handling.

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How to get which attribute causes the AttributeError except inspecting strings? ZhangXiang <zhangyangyu0614@gmail.com> - 2016-03-07 00:46 -0800
  Re: How to get which attribute causes the AttributeError except inspecting strings? Peter Otten <__peter__@web.de> - 2016-03-07 10:48 +0100
    Re: How to get which attribute causes the AttributeError except inspecting strings? Xiang Zhang <zhangyangyu0614@gmail.com> - 2016-03-07 02:15 -0800
  Re: How to get which attribute causes the AttributeError except inspecting strings? jmp <jeanmichel@sequans.com> - 2016-03-07 11:50 +0100
    Re: How to get which attribute causes the AttributeError except inspecting strings? Xiang Zhang <zhangyangyu0614@gmail.com> - 2016-03-07 08:25 -0800
      Re: How to get which attribute causes the AttributeError except inspecting strings? Tim Golden <mail@timgolden.me.uk> - 2016-03-07 16:38 +0000
        Re: How to get which attribute causes the AttributeError except inspecting strings? Xiang Zhang <zhangyangyu0614@gmail.com> - 2016-03-07 09:01 -0800
      Re: How to get which attribute causes the AttributeError except inspecting strings? Mark Lawrence <breamoreboy@yahoo.co.uk> - 2016-03-07 17:26 +0000

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