Hi, On Thu, Oct 09, 2008 at 02:19:35AM +0200, Ondrej Certik wrote: > if hasattr(i, "__iter__"): > RuntimeError: internal error: <RuntimeError object at 0xb03b60>
This occurs because our 'str' type has an '__iter__' special method. It turns out that CPython's does not. I suppose we could remove our __iter__, but I would rather suggest that sympy's code is fragile there: as soon as someone realizes that in CPython it is possible to speed up iteration over strings by creating a stringiterator type, then CPython will grow a 'str.__iter__' as well, and the same infinite recursion will occur in sympy... A cleaner way to say "is x iterable?" would be to try to call iter(x) and see if it raises TypeError or not. A bientot, Armin _______________________________________________ [email protected] http://codespeak.net/mailman/listinfo/pypy-dev
