On Sun, Mar 28, 2010 at 7:58 PM, Ronan Lamy <ronan.l...@gmail.com> wrote:
> Le vendredi 26 mars 2010 à 23:58 -0700, Ondrej Certik a écrit :
>> On Fri, Mar 26, 2010 at 1:42 PM, Ronan Lamy <ronan.l...@gmail.com> wrote:
>> > Le jeudi 25 mars 2010 à 22:21 -0700, Ondrej Certik a écrit :
>> [...]
>> >> Yes, I would also define .simplify(), and maybe other methods in
>> >> Basic. Last time I sent the patch for this, it was opposed, that such
>> >> methods only make the Basic class (core) more complex. But I still
>> >> think that the most frequent methods (and simplify is one of them)
>> >> should be in the Basic. Also integrate.
>> >>
>> >> What do other think about this?
>> >
>> > That's quite exactly the opposite of what I've been trying to do. Having
>> > a big tangle of tightly coupled code is exactly what is preventing us
>> > from refactoring the core - and in particular, from replacing the
>> > assumption system.
>>
>> Here is the patch implementing .simplify():
>>
>>
>> --- a/sympy/core/basic.py
>> +++ b/sympy/core/basic.py
>> @@ -2256,6 +2256,10 @@ def _eval_nseries(self, x, x0, n):
>> """
>> raise NotImplementedError("(%s).nseries(%s, %s, %s)" % (self, x,
>> x0, n)
>>
>> + def simplify(self):
>> + from sympy import simplify
>> + return simplify(self)
>> +
>> def limit(self, x, xlim, direction='+'):
>> """ Compute limit x->xlim.
>> """
>>
>>
>> and we already have .limit(), so I really think this does not make the
>> core any more complex.
>
> I agree that it's not too bad (I thought you meant something more
> complex), but I'm still (weakly) against it since it introduces a
> dependency of the core on the rest of code.
Well, that's why I am importing simplify inside the method, so that
the core doesn't depend on the rest.
Ondrej
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