Hi,
There's also an old issue for this
https://github.com/sympy/sympy/issues/4709
Sudhanshu Mishra
On Fri, Apr 24, 2015 at 3:32 AM, Jason Moore <moorepa...@gmail.com> wrote:
> That makes sense, but I'm not sure whether "Garbage in - Garbage Out"
> should apply or whether SymPy should throw and error.
>
>
> Jason
> moorepants.info
> +01 530-601-9791
>
> On Thu, Apr 23, 2015 at 2:57 PM, Amit Saha <amitsaha...@gmail.com> wrote:
>
>> Hi all,
>>
>> Let's say I have a symbol:
>>
>> >>> x = Symbol('x', positive=True)
>>
>> Should the below substitution be permitted:
>>
>> >>> (x+1).subs({x:-5})
>> -4
>>
>> My thinking is if x is declared to be positive, substituting negative
>> values should result in an error. Does that make sense?
>>
>> Best,
>> Amit.
>>
>>
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