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

I guess you missed the quotes.

$ ./python foo.py 
Traceback (most recent call last):
  File "foo.py", line 2, in <module>
    from hashlib import *
TypeError: attribute name must be string, not 'tuple'

flox : You're right, sorry about that.

Here is a fixed patch.

The fixed file :
algorithms_constant_attribute_in_hashlib_module_update1.diff

Hi,

Maybe you have some ideas on this patch? I think it could be a nice
feature e.g in my app I need to support every hash algorithms available
so with optparse module it is possible to write something like :
 
        for __hashtype in ('md5', 'sha1',
'sha224','sha256','sha384','sha512'):
            __parser.add_option('--{}'.format(__hashtype), dest='hashtype',
                action='store_const', const='{}'.format(__hashtype),
                help='use the {} hash algorithm type'.format(__hashtype))
        __options, _ = __parser.parse_args()

And it would be better if this tuple could be provided by the hashlib
module itself, making the code more evolutive.

I'll be taking a look at this patch during the sprints at Pycon.  Will get back to you soonish :-)

I'll be taking a look at this patch during the sprints at Pycon.  Will get back to you soonish :-)

applied, it'll appear in 2.7 and 3.2.

r78528 and r78529.

Could the module also grow an attribute listing all available algos, or non-guaranteed algos? (Please tell me if I should open a new report.)

Sounds like a good idea.  frozensets for both.

Thanks for the reply. Reopening.

I cannot propose a patch since I don’t know how to introspect OpenSSL (or how to write C, for that matter).

Implemented in py3k r84554.

Great, thank you!