# list_dict_by_len.py

# list_dict_by_len.py

# sorting dictionary by length of values
d = {"three": [(4,1),(4,2)], "two": [(1,1),(1,2),(1,3)], "four": [(3,1)], "one": [(2,1),(2,2),(2,3),(2,4)]}
r = [k for k in sorted(d, key=lambda k: len(d[k]), reverse=True)]
for i in r:
    print i+'\t', d[i]