ScientificPython: numbers with units

>>> from Scientific.Physics.PhysicalQuantities \
         import PhysicalQuantity as PQ
>>> m = PQ(12, 'kg')        # number, dimension
>>> a = PQ('0.88 km/s**2')  # alternative syntax (string)
>>> F = m*a
>>> F
PhysicalQuantity(10.56,'kg*km/s**2')
>>> F = F.inBaseUnits()
>>> F
PhysicalQuantity(10560.0,'m*kg/s**2')
>>> F.convertToUnit('MN')  # convert to Mega Newton
>>> F
PhysicalQuantity(0.01056,'MN')
>>> F = F + PQ(0.1, 'kPa*m**2')  # kilo Pascal m^2
>>> F
PhysicalQuantity(0.010759999999999999,'MN')
>>> F.getValue()
0.010759999999999999