Comment #3 on issue 2283 by hector1...@gmail.com: Non-iterative 'in' http://code.google.com/p/sympy/issues/detail?id=2283
To check expr in EXPR, we can do, for i in expr.args: if i not in EXPR: return FALSE return True I think this will serve the purpose. And thanks for reminding me about this. I will work on this. -- You received this message because you are subscribed to the Google Groups "sympy-issues" group. To post to this group, send email to sympy-issues@googlegroups.com. To unsubscribe from this group, send email to sympy-issues+unsubscr...@googlegroups.com. For more options, visit this group at http://groups.google.com/group/sympy-issues?hl=en.