Python library to convert between SI unit prefixes

Question

I'm looking for a python library which comes with support to convert numbers between various SI prefixes, for example, kilo to pico, nano to giga and so on.What would you recommend?

Answer 1

I ported a simple function (original C version written by Jukka “Yucca” Korpela) to Python for formatting numbers according to SI standards. I use it often, for example, to set tick labels on plots, etc.

You can install it with:

pip install si-prefix

The source is available on GitHub.

Example usage:

from si_prefix import si_format

print si_format(.5)
# 500.0m  (default precision is 1)

print si_format(.01331, precision=2)
# 13.31m

print si_format(1331, precision=2)
# 1.33k

print si_format(1331, precision=0)
# 1k