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Re: Making the case for "typed" lists/iterators in python

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Date Sat, 17 Dec 2011 05:25:12 +1100
Subject Re: Making the case for "typed" lists/iterators in python
From Chris Angelico <rosuav@gmail.com>
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On Sat, Dec 17, 2011 at 5:05 AM, Roy Smith <roy@panix.com> wrote:
> Most of this was TL:DNR, but I will admit I often wish for a better way
> to log intermediate values.  For example, a common pattern in the code
> I'm working with now is functions that end in:
>
>   return [Foo(x) for x in bunch_of_x_thingies]
>
> When something goes amiss and I want to debug the problem, I often
> transform that into:
>
>    temp = [Foo(x) for x in bunch_of_x_thingies]
>    logger.debug(temp)
>    return temp
>
> It would be convenient to be able to get at and log the intermediate
> value without having to pull it out to an explicit temporary.

tee = lambda func,arg: (func(arg),arg)[1]

return tee(logger.debug,[Foo(x) for x in bunch_of_x_thingies])

ChrisA

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Thread

Making the case for "typed" lists/iterators in python Nathan Rice <nathan.alexander.rice@gmail.com> - 2011-12-16 12:48 -0500
  Re: Making the case for "typed" lists/iterators in python Roy Smith <roy@panix.com> - 2011-12-16 13:05 -0500
    Re: Making the case for "typed" lists/iterators in python Chris Angelico <rosuav@gmail.com> - 2011-12-17 05:25 +1100
    Re: Making the case for "typed" lists/iterators in python Arnaud Delobelle <arnodel@gmail.com> - 2011-12-16 18:38 +0000
    Re: Making the case for "typed" lists/iterators in python Chris Angelico <rosuav@gmail.com> - 2011-12-17 05:43 +1100
      Re: Making the case for "typed" lists/iterators in python Mel Wilson <mwilson@the-wire.com> - 2011-12-16 15:14 -0500
    Re: Making the case for "typed" lists/iterators in python Ben Finney <ben+python@benfinney.id.au> - 2011-12-17 07:17 +1100
    Re: Making the case for "typed" lists/iterators in python Terry Reedy <tjreedy@udel.edu> - 2011-12-16 17:21 -0500
  Re: Making the case for "typed" lists/iterators in python Ulrich Eckhardt <ulrich.eckhardt@dominolaser.com> - 2011-12-19 14:16 +0100
    Re: Making the case for "typed" lists/iterators in python Nathan Rice <nathan.alexander.rice@gmail.com> - 2011-12-19 10:56 -0500

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