A simple library for making your data dimensionful.

Dimensionful depends on sympy-0.71+. Please install (or upgrade) sympy first.

$ pip install sympy

If you do not have pip in your current environment, I recommend installing it with easy_install pip.

Then install dimensionful.

$ cd dimensionful
$ python setup.py install

I'm looking into putting the project on pypi. In the meantime, please use the normal distutils installer in setup.py.

This prints "The force of gravity between the Earth and Sun is 3.54296304519e+27 cm*g/s**2".

# Import the gravitational constant and the Quantity class
from dimensionful import G, Quantity

# Supply the mass of Earth, mass of Sun, and the distance between.
mass_earth = Quantity(5.9742e27, "g")
mass_sun = Quantity(1.0, "Msun")
distance = Quantity(1.0, "AU")

# Calculate it
force_gravity = G * mass_earth * mass_sun / distance**2
force_gravity.convert_to_cgs()

# Report
print "The force of gravity between the Earth and Sun is %s" % force_gravity

You can also find this in the example directory.

Some simple docs are in dimensionful/doc.