>>> from clotheshop import low_stock

>>> d = {('Pan85', 'XS','black'):100,('Pan85','S','black'):300,
... ('Pan85','XS','blue'):6,('Pan87','S','blue'):5,
... ('Pan87','L','blue'):12,('Pan85','M','white'):6,
... ('Pan85','L','white'):5,('Cam23','XL','white'):12}
>>> lresult = low_stock(d,10)
>>> lresult.sort()
>>> lresult
[('Pan85', 'L', 'white'), ('Pan85', 'M', 'white'), ('Pan85', 'XS', 'blue'), ('Pan87', 'S', 'blue')]