Rouslan Korneychuk wrote: > I found the answer in Python's source code. When you execute a code > object, PyFrame_New is called which gets 'bultins' from 'globals', but > inside PyFrame_New (defined on line 596 of Objects/frameobject.c) is the > following (line 613): > > builtins = PyDict_GetItem(globals, builtin_object); > > Unlike PyObject_GetItem, PyDict_GetItem is specialized for dict objects. > Your ChainedDict class uses ChainMaps's storage and leaves dict's > storage empty, so PyDict_GetItem doesn't find anything. [...] > Interestingly: it looks like it could be fixed easily enough. Unless > there are other places where globals is assumed to be a dict object, it > would just be a matter of doing the same check and fallback in > PyFrame_New that is done in LOAD_GLOBAL (technically, you could just use > PyObject_GetItem; obviously, this is an optimization).
Thanks for the reply Rouslan. Perhaps I should report this as a bug. -- Steven -- http://mail.python.org/mailman/listinfo/python-list
