On Wed, Mar 17, 2010 at 10:47 PM, Nick Alexander <ncalexan...@gmail.com> wrote: > At the time I worked with this code, which was several months ago, there was > no public interface for crawling the structures. Testing for whether one > was looking at a sage value (meaning something with a parent) versus a > function application versus a derivative was really hard. When you have one > very general "expr" class, how else do you determine if you're looking at an > indefinite integral? (Or an addition, for that matter?)
You can traverse the structure with operator and operands. For example, everything in sage.symbolic.expression_conversions just walks the structure and does stuff based on that. --Mike -- To post to this group, send an email to sage-devel@googlegroups.com To unsubscribe from this group, send an email to sage-devel+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/sage-devel URL: http://www.sagemath.org
