Raymond Hettinger <raymond.hettinger@...> writes:
Also, I haven't seen much of a discussion of use cases.
Here's a selection of use cases from PyPy's source (You can search for "identity_dict" to see its use): In a algorithm for breaking cycles in graphs: http://codespeak.net/svn/pypy/trunk/pypy/tool/algo/graphlib.py Keeping track of all the allocated objects in a model of a low level runtime: http://codespeak.net/svn/pypy/trunk/pypy/rpython/lltypesystem/lltype.py Tracing the source of a certain kind of type as our type checker annotate RPython: http://codespeak.net/svn/pypy/trunk/pypy/annotation/bookkeeper.py Traversing the blocks of a function's graph: http://codespeak.net/svn/pypy/trunk/pypy/objspace/flow/model.py Essentially these are places where defined equality should not matter. I could also use it here: http://code.activestate.com/recipes/577242-calling-c-level-finalizers-withou...