I do not think that the problem here is with your understanding of sympy but rather with the way that pythonic variables work.
for instance: L = [1,2] a = L[0] # 'a' points to the object int(1) a = 5 # 'L' does not change but 'a' points to the object int(5) I used the verb "points" but it would be wrong to say that python variables are pointers. Checkout python's docs and search stackoverflow for questions on this subject. PS And be aware that L[i] = var is a syntactic sugar for a method call, something quite different from a = var On 3 March 2013 04:52, Bi Ge <seange...@gmail.com> wrote: > Hi Sympy community, > > I've been looking at issue3479 and trying to fix it by using minlex. > Right now I just put the following at the end of def eval(cls, i, j): > sort_args = minlex( ( i , j ) ) > i = sort_args[0] > j = sort_args[1] > > However, it still gives me the unchanged result such as: >>>>KroneckerDelta(n, m) > KroneckerDelta(n, m) > >>>>KroneckerDelta(m, n) > KroneckerDelta(m, n) > > I guess I still don't fully understand how symbols work in this function. > Any help will be appreciated. > > Regards, > > Bi Ge > > -- > 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 sympy+unsubscr...@googlegroups.com. > To post to this group, send email to sympy@googlegroups.com. > Visit this group at http://groups.google.com/group/sympy?hl=en. > For more options, visit https://groups.google.com/groups/opt_out. > > -- 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 sympy+unsubscr...@googlegroups.com. To post to this group, send email to sympy@googlegroups.com. Visit this group at http://groups.google.com/group/sympy?hl=en. For more options, visit https://groups.google.com/groups/opt_out.
