The PhysicalQuantity class made independent of K. Hinsen's ScientificPython package. This class is very useful for computation involving numbers with units.
>>> from physicalquantities import PhysicalQuantity as p # short hand
>>> distance1 = p('10 m')
>>> distance2 = p('10 km')
>>> total = distance1 + distance2
>>> total
PhysicalQuantity(10010.0,'m')
>>> total.convertToUnit('km')
>>> total.getValue()
10.01
>>> total.getUnitName()
'km'
>>> total = total.inBaseUnits()
>>> total
PhysicalQuantity(10010.0,'m')
>>>
>>> t = p(314159., 's')
>>> # convert to days, hours, minutes, and second:
>>> t2 = t.inUnitsOf('d','h','min','s')
>>> t2_print = ' '.join([str(i) for i in t2])
>>> t2_print
'3.0 d 15.0 h 15.0 min 59.0 s'
>>>
>>> e = p('2.7 Hartree*Nav')
>>> e.convertToUnit('kcal/mol')
>>> e
PhysicalQuantity(1694.2757596034764,'kcal/mol')
>>> e = e.inBaseUnits()
>>> str(e)
'7088849.77818 kg*m**2/s**2/mol'
>>>
>>> freeze = p('0 degC')
>>> freeze = freeze.inUnitsOf ('degF')
>>> str(freeze)
'32.0 degF'
>>>Run
pydoc PhysicalQuantities
to see an overview of all the physical units and their notation supported
by the PhysicalQuantities module.
sudo pip install -e git+https://https://github.com/jump2conclusionsmatt/physical-quantities.git#egg=physical-quantities
Or
git clone https://github.com/https://github.com/jump2conclusionsmatt/physical-quantities.git
cd physical-quantities
sudo python setup.py install
The PhysicalQuantities module was developed by Dr. Konrad Hinsen
and appears in the ScientificPython package. Unfortunately, ScientificPython requires NumPy version 1.8 or
less, and that is why H. P. Langtangen made this PhysicalQuantities
module independent of the ScientificPython package such that it is easy
in any project to compute with units.
The PhysicalQuantities.py file in the present directory is for Python 3.
There is an experimental Python 3 version in the subdirectory py23,
which depends on the future package.