I have now a mid term solution based on all your tips and it has been posted in Stackoverflow, in a post created for this issue. I would really appreciate if you could take a look there and make any suggestions you believe would improve the solution. I am still not managing to perform all the differentiations, but at least now it is applied only where it should.
On Monday, March 18, 2013 11:44:26 PM UTC+1, Julien Rioux wrote: > > On Monday, 18 March 2013 05:49:11 UTC-4, Saullo Castro wrote: >> >> Dear Mr. Zhang, we are using a differential operator as you need, please >> see more details on: >> >> http://stackoverflow.com/questions/15463412/matrix-of-differential-operators-in-python-module-sympy >> >> We could address it without changing the core classes in Sympy only when >> the differential operator is used on the left side. When it is used on the >> right side the method __mul__ in the core class Expr had to be changed. >> We are still looking for a Sympy native solution, though. >> >> Regards >> >> >> > _op_priority and the @call_highest_priority are there exactly for this > purpose. Define it in your class with a value above 10.0, which is Expr's > default value for it. Also define __rmul__, using the decorator > @call_highest_priority. This will allow your class to control what happens > during multiplication (left or right), but you will still run into subtle > problems because multiplication != application, as already a mentioned > couple of times. > > Cheers, > Julien > -- You received this message because you are subscribed to the Google Groups "sympy" group. To unsubscribe from this group and stop receiving emails from it, send an email to sympy+unsubscr...@googlegroups.com. To post to this group, send email to sympy@googlegroups.com. Visit this group at http://groups.google.com/group/sympy?hl=en-US. For more options, visit https://groups.google.com/groups/opt_out.
