If I consider only Dyck Paths, I can do write something like this:
DWS=DyckWords(3).list()
for D in DWS:
print(D.height())
to obtain the height of all Dyck paths of length 3. However, I would like to do the same thing but using NE-lattice paths from (0,0) to (m,n). Is there an easy way to do this in Sage?