On Tuesday, January 20, 2015 at 7:03:56 PM UTC+5:30, Rustom Mody wrote: > On Tuesday, January 20, 2015 at 11:38:27 AM UTC+5:30, Terry Reedy wrote: > > On 1/19/2015 5:06 PM, Zachary Gilmartin wrote: > > > Why aren't there trees in the python standard library? > > > > Sequences nested withing sequences can be regarded as trees, and Python > > has these. I regard Lisp as a tree processing languages, as it must be > > to manipulate, for example, code with nested structures. > > Yeah python has trees alright.
It may be best to read my example above in this order: 1. See the picture at http://www-math.ucdenver.edu/~wcherowi/courses/m4408/gtln8.html 2. Take the python representation of that >>> t [I, 6, [I, 2, [L, 1], [I, 4, [L, 3], [L, 5]]], [I, 8, [L, 7], [L, 9]]] Indent that a bit: [I, 6, [I, 2, [L, 1], [I, 4, [L, 3], [L, 5]]], [I, 8, [L, 7], [L, 9]]] Now compare with the picture above Only catch is you must see it 'lying down' Shouldn't be too hard given that we've all got used to seeing :-) as a smiley :-) -- https://mail.python.org/mailman/listinfo/python-list
