Roy, Per your advise:
>>> from base64 import b32encode >>> human_format = lambda n: 'Z%s-%s' % (b32encode(chr((n >> 24) & 255) + >>> chr((n >> 16) & 255))[:4], b32encode(chr((n >> 8) & 255) + chr(n & >>> 255))[:4]) >>> human_format(5738521581) 'ZKYFA-4PWQ' >>> human_format(17888279480) 'ZFI4Q-PO4A' >>> human_format(7395350007) 'ZXDGA-CX3Q' Side by side: Z05738521581 = ZKYFA-4PWQ Z17888279480 = ZFI4Q-PO4A Z07395350007 = ZXDGA-CX3Q Thanks. Andriy ---------------------------------------- > From: r...@panix.com > Subject: Re: How to generate account number? > Date: Sat, 3 Nov 2012 09:22:55 -0400 > To: python-list@python.org > > In article <mailman.3234.1351931985.27098.python-l...@python.org>, > Andriy Kornatskyy <andriy.kornats...@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). > -- > http://mail.python.org/mailman/listinfo/python-list -- http://mail.python.org/mailman/listinfo/python-list
