I had a 2 day break between exams so I began work on the CoordSystem class. Hopefully, I'll be able to make a WIP PR before 15th.
One problem I am facing is this: In this class, there is a *lot* of initialization going on. A part of that is generating non-commutative symbols to represent the basis elements. Since we planning to support n dimensional coordinate system for rectangular coordinates, I would need n basis elements. So, I basically need to do initialization n times like so: self.e1 = Symbol('e1') ... upto n times. Obviously this is not feasible since we don't know n. I can get a tuple of symbols using the symbols('e1: '+ str(n+1)) but then again is the problem of initializing the object properties. The only way I can think of doing this is to use the exec statement. sym_tuple = symbols('e1:' + str(n+1)) for i in range(1, n+1): cmd = 'self.e' + str(i) + ' = sym_tuple[ ' + str(i-1) + ']' exec cmd But then again, I know that using exec is frowned upon in general. So, is there a better way to go about this? -- 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.