>>> from botigaroba import actualitza_estoc

>>> d = {('Pan85', 'XS','negre'):100,('Pan85','S','negre'):300,
... ('Pan85','XS','blau'):6,('Pan87','S','blau'):5,
... ('Pan87','L','blau'):12,('Pan85','M','blanc'):6,
... ('Pan85','L','blanc'):5,('Cam23','XL','blanc'):12}
>>> lvendes = [['Pan87','S','blau',3],['Cam23','XL','blanc',9],
... ['Pan87','L','blau',1]]
>>> lrepo = [['Pan87','L','blau',5],['Cam23','S','blau',5]]
>>> actualitza_estoc(d,lvendes,lrepo)
>>> d == {('Pan85', 'XS','negre'):100,('Pan85','S','negre'):300,
... ('Pan85','XS','blau'):6,('Pan87','S','blau'):2,
... ('Pan87','L','blau'):16,('Pan85','M','blanc'):6,
... ('Pan85','L','blanc'):5,('Cam23','XL','blanc'):3,
... ('Cam23','S','blau'):5}
True