Hi I can't comment on the first part but for the boolean expression, it's a design issue. Booleans have not been derived from Expr class in sympy which is why it fails.
Sudhanshu Mishra On Tue, Aug 25, 2015 at 2:39 AM, Nico <nico.schloe...@gmail.com> wrote: > With `codegen`, one can generate code from a sympy expression. Typically, > it is assumed that the return value is a scalar. > > In one of my use cases, the return value is Boolean. (The answer to "Is x > inside a particular domain?") > The hack I employed so far is to generate the code as usual > ``` > from sympy import * > from sympy.utilities.codegen import codegen > > x = Symbol('x') > expr = x**2 - x + sin(x) < x**3 - 2*x - cos(5*x) # ok > [(c_name, c_code), (h_name, c_header)] = codegen(("f", expr), "C") > print(c_code) > ``` > and then regex the relevant part out of `c_code`. (If you know of a better > way to handle this, I'll be happy to hear about it.) > This works alright, but fails in the most simple cases, e.g., > ``` > expr = True > ``` > with > ``` > TypeError: The first argument must be a sympy expression. > ``` > Quite understandable. > > Is there a better way/hack to support this kind of code generation? > > Cheers, > Nico > > -- > 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. > To view this discussion on the web visit > https://groups.google.com/d/msgid/sympy/21baed7f-e7e6-4d1e-979c-6d30dee206e9%40googlegroups.com > <https://groups.google.com/d/msgid/sympy/21baed7f-e7e6-4d1e-979c-6d30dee206e9%40googlegroups.com?utm_medium=email&utm_source=footer> > . > For more options, visit https://groups.google.com/d/optout. > -- 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. To view this discussion on the web visit https://groups.google.com/d/msgid/sympy/CAFW_KCRdTTExAHyVCPj0WoxxCcDe6Zw0br8eUWhNoxaVFLPJHw%40mail.gmail.com. For more options, visit https://groups.google.com/d/optout.