Greetings, Thought I'd take a whack at running SCons on pypy (based on a presentation at SFPython where the developer say 50x CPython speeds).
Anyway it turns out that using __slots__ + assiging to __class__ which we do a few places in the Node's classes causes: TypeError: __class__ assignment: 'Entry' object layout differs from 'Dir': I hopped on #pypy and a developer there took a quick look as said turning of __slot__ got it a bit further through. As a side note, the canonical way to tell if you are running under pypy is as follows: if '__pypy__' not in sys.builtin_module_names Anyone have any thoughts on the relative difficulties of disabling slots for pypy vs removing reassigning an objects class in the Nodes hierarchy? -Bill
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