I was using sympy's default_sort_order to sort objects. However, I realized that it does not sort numerical quantities in order:
In [15]: sorted([-1, -1-sqrt(2),1+sqrt(2), pi, 4], key=default_sort_key) Out[15]: [-1, 4, pi, 1 + sqrt(2), -sqrt(2) - 1] The default sort key, lex, works in this case In [16]: sorted([-1, -1-sqrt(2),1+sqrt(2), pi, 4]) Out[16]: [-sqrt(2) - 1, -1, 1 + sqrt(2), pi, 4] but that doesn't work on symbolic objects. Is there a way to sort that works on all sympy objects, symbolic or not, but still produces the normal order for numerical quantities? The only thing I can think of is trying the lex sort key first, then reverting to default_sort_key on TypeError. But, that has the undesirable effect of changing the relative order of numerical quantities once a symbolic quantity is added to the mix. Any suggestions or pointers to a place where this is discussed already? Thanks, Duane -- 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. To view this discussion on the web visit https://groups.google.com/d/msgid/sympy/7c2f4357-6038-4dd0-8716-c80c9a38277e%40googlegroups.com. For more options, visit https://groups.google.com/d/optout.
