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Re: Python Error message

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Steven,

On Thu, Aug 4, 2016 at 11:56 AM, Steven D'Aprano
<steve+python@pearwood.info> wrote:
> On Fri, 5 Aug 2016 01:31 am, GBANE FETIGUE wrote:
>
>> try:
>>   parsed_response = json.loads(response)
>>   deployid  = parsed_response[u'id']
>>   print "Your deployid is: " + deployid
>> except:
>>     print 'Seems the named id  already exists!'
>
>
> I'm not going to try to debug your code blindfolded with my hands tied
> behind my back. Get rid of those "try...except" blocks so that you can see
> what error is *actually* happening.
>
> As you have it now, an error happens, somewhere. You don't know where the
> error is, or what it is, but Python generates a nice exception showing all
> the detail you need to debug.
>
> But you catch that exception, throw it away, and then print a lie.
>
> It is **not true** that the named ID already exists. That is not what the
> error is, so why does your script tell a lie?
>
> The output from the server might give you a clue:
>
> "The server refused this request because the request entity is in a format
> not supported by the requested resource for the requested method."
>
>
> Never[1] use a bare "try...except". It is the worst thing you can do to a
> Python script, making it almost impossible to debug.
>
> https://realpython.com/blog/python/the-most-diabolical-python-antipattern/
>
> Fix that problem first, get rid of the "try...except" and lying print
> messages, and then either the bug will be obvious, or we can debug further.
>
>
>
>
>
>
> [1] There are exceptions to this rule, for experts. But if you need to ask
> what they are, you're not ready to know

But even the experts will never write such a code - you never know what happens
in a month. Server might throw some new exception, you may move on to
a different project,
etc, etc. ;-)

Thank you.

>
>
> --
> Steve
> “Cheer up,” they said, “things could be worse.” So I cheered up, and sure
> enough, things got worse.
>
> --
> https://mail.python.org/mailman/listinfo/python-list

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Python Error message GBANE FETIGUE <bemen77@gmail.com> - 2016-08-04 08:31 -0700
  Re: Python Error message Chris Angelico <rosuav@gmail.com> - 2016-08-05 01:51 +1000
  Re: Python Error message Steven D'Aprano <steve+python@pearwood.info> - 2016-08-05 01:56 +1000
    Re: Python Error message Igor Korot <ikorot01@gmail.com> - 2016-08-04 12:09 -0400
    Re: Python Error message Chris Angelico <rosuav@gmail.com> - 2016-08-05 02:14 +1000
    Re: Python Error message MRAB <python@mrabarnett.plus.com> - 2016-08-04 17:19 +0100
    Re: Python Error message Terry Reedy <tjreedy@udel.edu> - 2016-08-04 15:36 -0400
    Re: Python Error message Chris Angelico <rosuav@gmail.com> - 2016-08-05 05:53 +1000
  Re: Python Error message dieter <dieter@handshake.de> - 2016-08-05 09:03 +0200

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