[Image-SIG] Information about PythonMagick

[Fredrik Lundh]

Don Rozenberg wrote:

> *****************************************************************
> Failure in example: im = ImageMath.eval("float(im + 20)",
> im=im.convert("L"))
> from line #116 of selftest.testimage
> Exception raised:
> Traceback (most recent call last):
>   File "./doctest.py", line 499, in _run_examples_inner
>     exec compile(source, "<string>", "single") in globs
>   File "<string>", line 1, in ?
>   File "PIL/ImageMath.py", line 200, in eval
>     out =__builtin__.eval(expression, args)
>   File "<string>", line 0, in ?
> TypeError: __float__ returned non-float (type instance)
> *****************************************************************
>
> I am running python 2.4.1 on a Knoppix/Debian system.  I installed
> python from source. It seems that these failures involve exactly what I
> want to do.  I then tried using python 2.3.5 and '57 tests passed.'.
> Is this a known problem in python 2.4.1?

it's not a known problem, but it looks like it's a 2.4[.1]-specific problem,
which only affects the int() and float() operations.  this shouldn't be hard
to fix; I'll see if I can come up with a patch.

</F>