pycodata 2.0.1

pycodata: CODATA constants for python.

Introduction

pycodata is a library providing the latest codata constants (2022) and older values (2018, 2014 and 2010). The raw codata are taken from http://physics.nist.gov/constants. The constants (values and uncertainties) are implemented as dictionnaries.

Installation

In a terminal, enter:

pip install pycodata

Usage

The latest values (2022) do not have the year as a suffix in their name. Older values can be used and they feature the year as a suffix in their name.

The latest values are available at the top level and older values are available in dedicated modules.

import pycodata

print("########## VERSION ##########")
print(f"version = {pycodata.__version__}")

print("########## constants ##########")
print(f"c =", pycodata.SPEED_OF_LIGHT_IN_VACUUM["value"])

print("########## UNCERTAINTY ##########")
print(f"u(c) = ", pycodata.SPEED_OF_LIGHT_IN_VACUUM["uncertainty"])

print("########## OLDER VALUES ##########")
print(f"Mu_2022 = ", pycodata.MOLAR_MASS_CONSTANT["value"])
print(f"Mu_2018 = ", pycodata.codata_constants_2018.MOLAR_MASS_CONSTANT_2018["value"])
print(f"Mu_2014 = ", pycodata.codata_constants_2014.MOLAR_MASS_CONSTANT_2014["value"])
print(f"Mu_2010 = ", pycodata.codata_constants_2010.MOLAR_MASS_CONSTANT_2010["value"])

License

MIT