Path: csiph.com!fu-berlin.de!uni-berlin.de!not-for-mail
From: Chris Angelico <rosuav@gmail.com>
Newsgroups: comp.lang.python
Subject: Re: pylint woes
Date: Mon, 9 May 2016 08:07:25 +1000
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On Mon, May 9, 2016 at 6:45 AM, Larry Hudson via Python-list
<python-list@python.org> wrote:
> On 05/08/2016 06:01 AM, Chris Angelico wrote:
> [snip...]
>>
>> ...                                          I like to recommend a
>> little thing called "IIDPIO debugging" - If In Doubt, Print It Out.
>> That means: If you have no idea what a piece of code is doing, slap in
>> a print() call somewhere. It'll tell you that (a) the code is actually
>> being executed, and (b) whatever info you put between the parens
>> (ideally, some key variable or parameter)...
>
>
> My personal variation of IIPPID debugging is to use input() instead of
> print().  For example:
>
>     input('x = {}, y = {} --> '.format(x, y))
>
> Then the program stops at this point so you can examine the values.  <Enter>
> will continue the program or ^C will abort (if you see what the problem is
> now).  Of course this can't be used in all situations, but it's handy where
> it can.
>
> Note that my personal preference is to stick that "-->" as a prompt at the
> end, but obviously this (or a similar marker) is optional.

Neat technique. Not something to use *every* time (and not always
sensible - eg you don't normally want to stall out a GUI thread), but
definitely worth keeping in the arsenal.

ChrisA