si-units

Representation of SI unit valued scalars and arrays. Python bindings to the quantity Rust library.

The package is written with flexibility in mind and is able to represent arbitrarily complex units. Additional to simple scalar quantities, it also provides utilities for vector valued quantities based on numpy, where all entries share the same unit.

Installation and Usage

You can install the python package from source (you need a rust compiler for that):

pip install git+https://github.com/itt-ustutt/quantity

or get the compiled files from PyPI

pip install si-units

Examples

Calculate the pressure of an ideal gas.

from si_units import *
temperature = 25.0 * CELSIUS
volume = 1.5 * METER**3
moles = 75.0 * MOL
pressure = moles * RGAS * temperature / volume
print(pressure) # 123.94785148011941 kPa

numpy functions can be used with SI units:

from si_units import *
import numpy as np
ms = np.linspace(2.0, 4.0, 3) * METER
sqms = ms**2
print(sqms) # [4, 9, 16] m²
print(sqms.sqrt()) # [2, 3, 4] m

Documentation

For the documentation, see here.