On Wed, Jul 10, 2013 at 1:24 AM, Aaron Meurer <[email protected]> wrote: > Yep, strings often (but won't always!) work as input. See > https://github.com/sympy/sympy/wiki/Idioms-and-Antipatterns#strings-as-input.
Thanks. Yeah, I have learned that from one of my earlier posts to the forum. In this case it should be fine, I guess. In fact, I think I made my original query ambiguous: I was really asking about passing the symbol to be solved for as a string, *not* the expression. Is this a better approach: >>> expr = 'x*2 + 5 + y' >>> expr=sympify(expr) >>> for symbol in expr.atoms(Symbol): ... if str(symbol)=='x': ... solve(expr, symbol) ... [-y/2 - 5/2] So, I look for the symbol I want to solve for and then invoke solve using the symbol itself, this having to avoid passing a string. -- http://echorand.me -- 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. For more options, visit https://groups.google.com/groups/opt_out.
