python sorting dictionary by length of values

Question

I have found many threads for sorting by values like here but it doesn\'t seem to be working for me...

I have a dictionary of lists that have tuples. Each list has a

Answer 1

>>> d = {"one": [(1,3),(1,4)], "two": [(1,2),(1,2),(1,3)], "three": [(1,1)]}
>>> for k in sorted(d, key=lambda k: len(d[k]), reverse=True):
        print k,


two one three

Here is a universal solution that works on Python 2 & Python 3:

>>> print(' '.join(sorted(d, key=lambda k: len(d[k]), reverse=True)))
two one three