Thanks, Aaron Meurer. I have opened a new issue : http://code.google.com/p/sympy/issues/detail?id=2663&q=sympify&colspec=ID%20Type%20Status%20Priority%20Milestone%20Owner%20Summary%20Stars
For my use, I have succeeded with a workaround in "Limit" (passing some functions as "locals=locals()" argument for "sympify", it is not elegant but works. -- You received this message because you are subscribed to the Google Groups "sympy" group. To post to this group, send email to [email protected]. To unsubscribe from this group, send email to [email protected]. For more options, visit this group at http://groups.google.com/group/sympy?hl=en.
