Comment #2 on issue 1735 by Vinzent.Steinberg: Use expr.func to get the head of expressions. http://code.google.com/p/sympy/issues/detail?id=1735
Don't you think you could even use 'is' instead of '=='? For things like if arg.func == asinh: ... it makes sense in my opinion. This could really speed up the core. A disadvantage is that it is no longer possible to use user-defined core functions (without using isinstance), but I don't see a reason to do this anyway. -- You received this message because you are listed in the owner or CC fields of this issue, or because you starred this issue. You may adjust your issue notification preferences at: http://code.google.com/hosting/settings -- You received this message because you are subscribed to the Google Groups "sympy-issues" group. To post to this group, send email to sympy-iss...@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.
