Re: [Python-ideas] An identity dict

Raymond Hettinger <raymond.hettinger@...> writes:

Also, there hasn't been much discussion of implementation, but unless you're willing to copy and paste most of the code in dictobject.c, you're going to end-up with something much slower than d[id(obj)]=value.

It can be implemented simply in Python: http://codespeak.net/svn/pypy/trunk/pypy/lib/identity_dict.py