>>> from screw import screw

>>> screw('M3-0.50x10')
(3, 0.5, 10)
>>> screw('M10-0.1x5')
(10, 0.1, 5)
>>> screw('M14-2.0x125')
(14, 2.0, 125)
>>> screw('M10-2.0')
'code error'
>>> screw('M30.50x10')
'code error'
>>> screw('M3x0.50-10')
'code error'
>>> screw('A14-2.0x125')
'code error'