Le 08/10/2011 17:14, Victor Stinner a écrit :

Le 08/10/2011 15:03, Antoine Pitrou a écrit :

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On Fri, 07 Oct 2011 21:14:44 -0600 Jeffrey wrote:

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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

Oops, I answered to the wrong mailing list. Victor