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Groups > comp.lang.python > #65056

Re: Statement evals as False in my IDE and True elsewhere

References <a543e1a5-ef00-42b0-96df-5bf9ee8ac74c@googlegroups.com>
Date 2014-01-31 09:25 +1100
Subject Re: Statement evals as False in my IDE and True elsewhere
From Chris Angelico <rosuav@gmail.com>
Newsgroups comp.lang.python
Message-ID <mailman.6171.1391121221.18130.python-list@python.org> (permalink)

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On Fri, Jan 31, 2014 at 9:04 AM, CM <cmpython@gmail.com> wrote:
>     fake_data = ['n/a', 'n/a', 'n/a', 'n/a', '[omitted]', '12']
>     fake_result = not all(i == '[omitted]' for i in fake_data)
>     print 'This is fake result: ', fake_result

Trying to get my head around this. You want to see if all the values
in fake_data are '[omitted]' or not? That is to say, if there's
anything that isn't '[omitted]'? Not sure that that's a normal thing
to be asking, but that's what your code appears to do.

What happens if you try this?

fake_data = ['n/a', 'n/a', 'n/a', 'n/a', '[omitted]', '12']
fake_result = set(fake_data)>{'[omitted]'}

In theory, that should do the exact same thing as your code (returning
True if there's anything in fake_data that is not '[omitted]').

The other thing to try is peppering your code with print statements.
Divide the work up into pieces - show the entire loop and what happens
- print out everything you can imagine. See where the difference
begins between inside and outside the IDE. Once you find that, you'll
have a clue as to what's wrong.

ChrisA

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Thread

Statement evals as False in my IDE and True elsewhere CM <cmpython@gmail.com> - 2014-01-30 14:04 -0800
  Re: Statement evals as False in my IDE and True elsewhere Peter Otten <__peter__@web.de> - 2014-01-30 23:14 +0100
    Re: Statement evals as False in my IDE and True elsewhere CM <cmpython@gmail.com> - 2014-01-30 14:48 -0800
      Re: Statement evals as False in my IDE and True elsewhere Chris Angelico <rosuav@gmail.com> - 2014-01-31 09:55 +1100
        Re: Statement evals as False in my IDE and True elsewhere CM <cmpython@gmail.com> - 2014-01-30 15:02 -0800
      Re: Statement evals as False in my IDE and True elsewhere Peter Otten <__peter__@web.de> - 2014-01-31 00:08 +0100
      Re: Statement evals as False in my IDE and True elsewhere Terry Reedy <tjreedy@udel.edu> - 2014-01-31 00:05 -0500
      Re: Statement evals as False in my IDE and True elsewhere Chris Angelico <rosuav@gmail.com> - 2014-01-31 16:07 +1100
  Re: Statement evals as False in my IDE and True elsewhere Chris Angelico <rosuav@gmail.com> - 2014-01-31 09:25 +1100
    Re: Statement evals as False in my IDE and True elsewhere CM <cmpython@gmail.com> - 2014-01-30 15:00 -0800
      Re: Statement evals as False in my IDE and True elsewhere Chris Angelico <rosuav@gmail.com> - 2014-01-31 10:25 +1100
      Re: Statement evals as False in my IDE and True elsewhere Terry Reedy <tjreedy@udel.edu> - 2014-01-31 00:09 -0500

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