Keeping track of units with Pint

Correctly keeping track of units in calculations can be very difficult, particularly if there are places where different units can be used. For example, it is very easy to forget to convert between different units – feet/inches into meters – or metric prefixes – converting 1 km into 1,000 m, for instance.

In this recipe, we’ll learn how to use the Pint package to keep track of units of measurement in calculations.

Getting ready

For this recipe, we need the Pint package, which can be imported as follows:

import pint

How to do it...

The following steps show you how to use the Pint package to keep track of units in calculations:

1. First, we need to create a UnitRegistry object:

   ureg = pint.UnitRegistry(system="mks")

2. To create a quantity with a unit, we multiply the number by the appropriate attribute of the registry object:

   distance = 5280 * ureg.feet

3. We can change the units of the quantity...