>>> from afinitats import parelles_afins

>>> dic_vals = {'id1': [('id2',4), ('id3',7), ('id4',5), ('id7',9)],
...             'id2': [('id1',6), ('id3',2), ('id5',8)],
...             'id3': [('id1',5), ('id2',8)],
...             'id4': [('id1',9), ('id5',6), ('id6',7)],
...             'id5': [('id2',3), ('id4',5), ('id6',7), ('id7',6)],
...             'id6': [('id4',4), ('id5',7), ('id7',3)],
...             'id7': [('id1',8), ('id5',7), ('id6',4)] }

>>> r = parelles_afins(dic_vals, 7)
>>> r
[('id1', 'id7', 9, 8), ('id5', 'id6', 7, 7)]
>>> r = parelles_afins(dic_vals, 8)
>>> r
[('id1', 'id7', 9, 8)]