[Python-ideas] [Python-Dev] PEP 3101 (Advanced string formatting) base 36 integer presentation type

Victor Stinner victor.stinner at haypocalc.com
Sun Oct 9 11:50:35 CEST 2011

Le 08/10/2011 17:14, Victor Stinner a écrit :
> Le 08/10/2011 15:03, Antoine Pitrou a écrit :
>> On Fri, 07 Oct 2011 21:14:44 -0600
>> Jeffrey<jss.bulk at gmail.com> wrote:
>>> I would like to suggest adding an integer presentation type for base 36
>>> to PEP 3101. I can't imagine that it would be a whole lot more
>>> difficult than the existing types. Python's built-in long integers
>>> provide a nice way to prototype and demonstrate cryptographic
>>> operations, especially with asymmetric cryptography. (Alice and Bob
>>> stuff.) Built-in functions provide modular reduction, modular
>>> exponentiation, and lots of nice number theory stuff that supports a
>>> variety of protocols and algorithms. A frequent need is to represent a
>>> message by a number. Base 36 provides a way to represent all 26 letters
>>> in a semi-standard way, and simple string transformations can
>>> efficiently make zeros into spaces or vice versa.
>> Why base 36 rather than, say, base 64 or even base 80?
> Base 85 is the most efficient base to format IPv6 addresses!
> http://tools.ietf.org/html/rfc1924
> And Python doesn't provide builtin function for this base!
> Victor

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