On Jun 11, 8:55 pm, Christian Heimes <li...@cheimes.de> wrote: > Phil Thompson schrieb: > > > How stable should the implementation of, for example, a string's hash > > across different Python versions? > > > Is it defined that hash("foo") will return the same value for Python 2.5.1, > > 2.6.1 and 2.6.2? > > The hash of an object is an internal implementation detail. The hash() > value of an object isn't even stable for the one version of Python. It > depends on the architecture (32 vs. 64bit OS, maybe even big vs. little > endian). The hash sums of objects like classes may and most likely do > change when you restart the interpreter.
What he said. I remember at least one recent hash change: the algorithm for computing the hash of a long is different in Python 2.5.x and Python 2.6.x. Mark -- http://mail.python.org/mailman/listinfo/python-list