>>> from trajectories import troba_anomalies

>>> tr1 = [
...   (3, 5, 10),
...   (3, 6, 10),
...   (3, 6, 9),
...   (2, 6, 9),
...   (2, 6, 8),
... ]
>>> it1 = iter(tr1)
>>> an1 = troba_anomalies(it1)
>>> an1 is iter(an1)
True
>>> list(an1)
[]

>>> tr2 = [
...   (3, 5, 10),
...   (2, 6, 10),  # canvia més d'una coordenada en una unitat
...   (2, 6, 9),
...   (2, 6, 9),   # no canvia cap coordenada
...   (2, 6, 8),
...   (4, 6, 7),   # canvia més d'una coordenada i una d'elles en més d'una unitat
... ]
>>> it2 = iter(tr2)
>>> an2 = troba_anomalies(it2)
>>> an2 is iter(an2)
True
>>> list(an2)
[((3, 5, 10), (2, 6, 10)), ((2, 6, 9), (2, 6, 9)), ((2, 6, 8), (4, 6, 7))]

>>> tr3 = [
...   (3, 5, 10),
...   (2, 7, 9),
...   (2, 6, 8),
...   (2, 6, 8),
...   (4, 6, 8),
...   (4, 6, 8),
...   (10, 10, 10),
...   (11, 11, 11),
... ]
>>> it3 = iter(tr3)
>>> an3 = troba_anomalies(it3)
>>> an3 is iter(an3)
True
>>> list(an3)
[((3, 5, 10), (2, 7, 9)), ((2, 7, 9), (2, 6, 8)), ((2, 6, 8), (2, 6, 8)), ((2, 6, 8), (4, 6, 8)), ((4, 6, 8), (4, 6, 8)), ((4, 6, 8), (10, 10, 10)), ((10, 10, 10), (11, 11, 11))]