Hi,

The hashlib module could provide a tuple offering the names of the
different hash algorithms which are guaranteed to be supported.

The expected result: 

>>> import hashlib
>>> hashlib.algorithms
('md5', 'sha1', 'sha224', 'sha256', 'sha384', 'sha512')

Here is a patch to do so. It also provides an update for the hashlib
documentation and a test case.

Bye,
Carl Chenet