tuples from lists

[Terry Reedy]

"Bob Roberts" <bobnotbob at byu.edu> wrote in message
news:c4e6b17d.0303091212.4fee8ea9 at posting.google.com...
> I have a list of lists of lists.  How can I turn that into a tuple
of
> tuples of tuples?

You have to work from inside out.

masterlist = [ [ [111,112], [121,122] ], [ [211,212], [221,222] ] ]

for i in range(len(masterlist)):
  for j in range(len(masterlist[i])):
    masterlist[i][j] = tuple(masterlist[i][j])
  masterlist[i] = tuple(masterlist[i])

masterlist = tuple(masterlist)
print masterlist
#prints, cut and pasted
#(((111, 112), (121, 122)), ((211, 212), (221, 222)))

Terry J. Reedy