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Re: How to generate account number?

From Roy Smith <roy@panix.com>
Newsgroups comp.lang.python
Subject Re: How to generate account number?
Date 2012-11-03 09:22 -0400
Organization PANIX Public Access Internet and UNIX, NYC
Message-ID <roy-1E6B33.09225503112012@news.panix.com> (permalink)
References <mailman.3220.1351890866.27098.python-list@python.org> <1gsdm9-r2c.ln1@crazy-horse.bildanet.com> <mailman.3234.1351931985.27098.python-list@python.org>

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In article <mailman.3234.1351931985.27098.python-list@python.org>,
 Andriy Kornatskyy <andriy.kornatskyy@live.com> wrote:

> 'Z05738521581'
> 'Z17888279480'
> 'Z07395350007'
> 
> Short, human readable and satisfy original requirements.
> 
> Andriy

If you really want human readable, it's better to chunk the data up into 
3 or 4 digit groups.  So, instead of Z05738521581, maybe 
Z05-738-521-581.  Or perhaps even better, Z05-7385-21-581 (just a hunch, 
but I suspect varying the length of the groups makes it easier to read).

Even better might be base-32 encoding the value.  Strings of digits have 
an information density of about 3.2 bits/char. Base-32 is just about as 
readable, but gives you 5 bits/char, so you end up with a few less 
characters (which you still want to chunk into 3 or 4 character groups).

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Thread

How to generate account number? Andriy Kornatskyy <andriy.kornatskyy@live.com> - 2012-11-03 00:13 +0300
  Re: How to generate account number? GangGreene <GangGreene@example.com> - 2012-11-02 18:02 -0400
    RE: How to generate account number? Andriy Kornatskyy <andriy.kornatskyy@live.com> - 2012-11-03 11:38 +0300
      Re: How to generate account number? Roy Smith <roy@panix.com> - 2012-11-03 09:22 -0400
        Re: How to generate account number? Tim Chase <python.list@tim.thechases.com> - 2012-11-03 10:34 -0500
        RE: How to generate account number? Andriy Kornatskyy <andriy.kornatskyy@live.com> - 2012-11-03 19:18 +0300
        RE: How to generate account number? Andriy Kornatskyy <andriy.kornatskyy@live.com> - 2012-11-03 19:23 +0300
  Re: How to generate account number? Steven D'Aprano <steve+comp.lang.python@pearwood.info> - 2012-11-02 22:39 +0000
    RE: How to generate account number? Andriy Kornatskyy <andriy.kornatskyy@live.com> - 2012-11-03 11:42 +0300

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