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MyASPN >> Mail Archive >> python-tutor
python-tutor
Re: [Tutor] Tutor Digest, Vol 26, Issue 71
by Barry Carroll other posts by this author
Apr 20 2006 11:25AM messages near this date
1 | [Tutor] Apology (Was: Re: Splitting a number into even- and odd- numbered digits)
Terry:

>  -----Original Message-----
>  Date: Thu, 20 Apr 2006 10:14:23 -0700 (PDT)
>  From: Terry Carroll <carroll@[...].com>
>  Subject: Re: [Tutor] FW: Splitting a number into even- and odd-
>  	numbered digits
>  To: tutor@[...].org
>  Message-ID:
>  	<Pine.LNX.4.44.0604201000430.19166-100000@[...].net>
>  Content-Type: TEXT/PLAIN; charset=US-ASCII
>  
<<snip> >
>  >
>  > I could not find a way to include these requirements in a single,
simple
>  > expression.
>  
>  I really liked John Fouhy's approach, or at least a variation of it:
>  
>  >>> def odd_even(s):
>  ...    '''
>  ...    Returns a tuple of two strings taken from s.  The first string
is
>  ...    the odd-numbered characters (counting from the right), and the
>  ...    second is the even-numbered characters.
>  ...    '''
>  ...    return (s[::-2][::-1], s[-2::-2][::-1])
>  ...
>  >>> odd_even("1234567")
>  ('1357', '246')
>  >>> odd_even("2345")
>  ('35', '24')
>  >>> odd_even("1")
>  ('1', '')
>  >>>
>  
>  John's original solution returned values with the digits in reverse
>  order; but that's easily changed by reslicing each string with [::-1].

By golly you're right!  That is a very slick solution.  It didn't occur
to me to re-reverse the strings like that.  Thanks to both you and John.


Regards,
 
Barry
barry.carroll@[...].com
541-302-1107
________________________
We who cut mere stones must always be envisioning cathedrals.

-Quarry worker's creed


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