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Date: Sun, 12 Oct 2014 15:42:35 -0500
From: Tim Chase <python.list@tim.thechases.com>
To: Marko Rauhamaa <marko@pacujo.net>
Subject: Re: while loop - multiple condition
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Xref: csiph.com comp.lang.python:79024

On 2014-10-12 22:16, Marko Rauhamaa wrote:
> is equivalent with
> 
>     while ans.lower()[0] != 'y':
>          ans = input('Do you like python?')

And still better improved with

  while ans[:1].lower() != 'y':
    ans = input('Do you like python?')

in the event that len(ans)==0 (a situation which will crash the
various current examples).

It also only expends the effort to lowercase 0-or-1 characters,
rather than lowercasing an entire string just to throw away
everything except the first character.

-tkc