On Wed, Mar 11, 2009 at 15:06, David Cournapeau <courn...@gmail.com> wrote: > Hi, > > I was looking at #936, to implement correctly the hashing protocol for > dtypes. Am I right to believe that tp_hash should recursively descend > fields for compound dtypes, and the hash value should depend on the > size/ndim/typenum/byteorder for each "atomic" dtype + fields name (and > titles) ? Contrary to comparison, we can't reuse the python C api, > since PyObject_Hash cannot be applied to the fields dict, right ?
Usually, one constructs a hashable analogue; e.g. taking the .descr and converting all of the lists to tuples. Then use PyObject_Hash on that. -- Robert Kern "I have come to believe that the whole world is an enigma, a harmless enigma that is made terrible by our own mad attempt to interpret it as though it had an underlying truth." -- Umberto Eco _______________________________________________ Numpy-discussion mailing list Numpy-discussion@scipy.org http://mail.scipy.org/mailman/listinfo/numpy-discussion
