https://github.com/sympy/sympy/wiki/development-workflow
Aaron Meurer
On Tue, Jun 25, 2013 at 9:16 AM, Shawn Garbett <shawn.garb...@gmail.com> wrote:
> I figured out the problem. It's in evalf_symbol.
>
> def evalf_symbol(x, prec, options):
> val = options['subs'][x]
>
> The x is the actual symbol and the numpy array provided is indexed by the
> string representation of the symbol.
>
> Numpy can't index by a Symbol, ugh.
>
> In [23]: x = array([(1.1, 2.2), (3.3, 4.4), (5.5, 6.6)],
> dtype=[(Symbol('s0'), '<f8'), (Symbol('s1'), '<f8')])
> ---------------------------------------------------------------------------
> TypeError Traceback (most recent call last)
> <ipython-input-23-3b59912775d8> in <module>()
> ----> 1 x = array([(1.1, 2.2), (3.3, 4.4), (5.5, 6.6)],
> dtype=[(Symbol('s0'), '<f8'), (Symbol('s1'), '<f8')])
>
> TypeError: data type not understood
>
> Could the evalf_symbol be modified to try the string representation as a
> fallback position, i.e. the path of least surprise?
>
> def evalf_symbol(x, prec, options):
> try:
> val = options['subs'][x]
> except IndexError:
> val = options['subs'][x.name]
>
> If this is an acceptable change, could someone point me in the direction of
> how to submit properly (e.g. ticket/ patch procedure)?
>
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