On Mon, Jun 8, 2009 at 11:43 AM, lczancanella<lczancane...@gmail.com> wrote: > Hi, > > in hashlib the hash methods have as parameters just string, i want to > know how can i digest an object to get a md5 hash of them.
Hashes are only defined to operate on bytestrings. Since Python is a high-level language and doesn't permit you to view the internal binary representation of objects, you're going to have to properly convert the object to a bytestring first, a process called "serialization". The `pickle` and `json` serialization modules are included in the standard library. These modules can convert objects to bytestrings and back again. Once you've done the bytestring conversion, just run the hash method on the bytestring. Be careful when serializing dictionaries and sets though, because they are arbitrarily ordered, so two dictionaries containing the same items and which compare equal may have a different internal ordering, thus different serializations, and thus different hashes. Cheers, Chris -- http://blog.rebertia.com -- http://mail.python.org/mailman/listinfo/python-list
