>Sure they're implemented. Oops, my apologies.
Just to build up on that, when I run: #start of listing import random A={1:None,2:None,"hello":None,(1,2,3):None} def dictcomp(n): for i in range(n): B=A.copy() C=A.copy() b=random.uniform(0,1) c=random.uniform(0,1) B[b]=None C[c]=None res=((B>C)==(b>c)) print res, dictcomp(1000) #end of listing I get 1000 True's on the output, which suggests that key-wise ordering is implemented in some guise. The question is: how do I access that? Thanks Martino -- http://mail.python.org/mailman/listinfo/python-list