>>> from temps import dif_segons

>>> d = dif_segons(1,53,1,50)
>>> d
180

>>> d = dif_segons(2,23,1,59)
>>> d
1440

>>> d = dif_segons(1,50,1,53)
>>> d
-180

>>> d = dif_segons(0,13,0,11)
>>> d
120

>>> d = dif_segons(0,13,0,14)
>>> d
-60

>>> d = dif_segons(1,35,1,35)
>>> d
0