Comment #15 on issue 2070 by smi...@gmail.com: All elements of .args should be Basic
http://code.google.com/p/sympy/issues/detail?id=2070
Sets and Tuple can also hold non-Basic bools; that's why a custom _eval_subs had to be written for Set.
-- 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.