On Tue, Feb 25, 2014 at 7:51 PM, Aditya Shah <[email protected]> wrote: > As you have stated previously, the framework need not detect the language > that it is parsing from and the user provides input regarding that. Now, > since this is a Mathematica string, we directly specify it to be so. In the > specification for Mathematica, we define that functions take arguments via [ > ] instead of the normal ( ). Also, we define that the built in functions > start with a capital letter and so their Sympy equivalent includes > converting them to lower case. And lastly the information about the inverse > trignometric function is given telling the framework to drop the 'Arc' and > add 'a' as a suffix to the function name. As for the framework, once the > specification is given we can construct a form of Earley parser to parse the > strings. > > So in this case, the flow will be something of the form: > > ArcSin[Sqrt[x]] ==> asin(Sqrt[x]) ==> asin(sqrt(x)) (which is the final > string)
Is this different to what we have already here: https://github.com/sympy/sympy/blob/master/sympy/parsing/mathematica.py > > So actually there would be a module that will generate a parser given a > specification. The actual parsing takes place using the generated parser. > > I think that Sympy needs a proper parsing framework so that it can be > extended very easily to other languages. I will work on the exact details of > the specification file (what input should be taken from the user regarding > the specification of the new language). I agree that it would be nice to be able to parse general things, e.g. things like "plot x^2 from x=1 to 10" and it would work like here: http://www.wolframalpha.com/input/?i=plot+x%5E2+from+x%3D1+to+10 But I don't know how difficult this is (I don't have much experience in this field), I suspect this is a huge undertaking. Ondrej -- 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 [email protected]. To post to this group, send email to [email protected]. Visit this group at http://groups.google.com/group/sympy. To view this discussion on the web visit https://groups.google.com/d/msgid/sympy/CADDwiVBiswSr_mRaok_JwYzkZy%2BPfxGX3nY2NTbjkAeSS2hEUw%40mail.gmail.com. For more options, visit https://groups.google.com/groups/opt_out.
