2009/8/11 Fabian Pedregosa <fab...@fseoane.net>
>
> oo % number now returns NaN instead of rasing an exception
> ---
> sympy/core/numbers.py | 3 +++
> sympy/core/tests/test_numbers.py | 1 +
> 2 files changed, 4 insertions(+), 0 deletions(-)
>
> diff --git a/sympy/core/numbers.py b/sympy/core/numbers.py
> index 11a2b72..59e86e5 100644
> --- a/sympy/core/numbers.py
> +++ b/sympy/core/numbers.py
> @@ -1190,6 +1190,9 @@ def __le__(a, b):
> return True
> return False
>
> + def __mod__(self, other):
> + return S.NaN
> +
>
> class NegativeInfinity(Rational):
> __metaclass__ = SingletonMeta
> diff --git a/sympy/core/tests/test_numbers.py
> b/sympy/core/tests/test_numbers.py
> index 876d782..3e9cdfc 100644
> --- a/sympy/core/tests/test_numbers.py
> +++ b/sympy/core/tests/test_numbers.py
> @@ -132,6 +132,7 @@ def test_Infinity():
> assert 1/oo == 0
> assert 1/(-oo) == 0
> assert 8/oo == 0
> + assert oo % 2 == nan
>
> def test_Infinity_2():
> x = Symbol('x')
> --
> 1.6.4
>>> oo % 2
nan
>>> 2 % oo
Traceback (most recent call last):
File "<stdin>", line 1, in <module>
TypeError: unsupported operand type(s) for %: 'int' and 'Infinity'
I think just adding
__rmod__ = __mod__
fixes this.
Vinzent
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