What’s included · Libraries

Libraries, built in

Ready to use No installingIncluded with Your plan

No installing, no setup. The libraries below come built in — just import them in your code and they work. Which ones you get depends on your plan.

Light comes with every plan (including Free & Student). Heavy adds the bigger number-crunching libraries and comes with Basic, Pro, and the trial. Don't see what you need? Request it below and we'll take a look.

Python

4 libraries
LightOn every plan — Free, Student & up
python-dateutilv2.9.0.post0

Powerful date/time parsing and arithmetic.

imports as dateutil

pytzv2024.1

Olson timezone database for timezone-aware datetimes.

HeavyBasic, Pro & Trial · includes everything in Light
numpyv1.26.4

N-dimensional arrays and vectorized numeric computing.

pandasv2.2.2

DataFrames for tabular data analysis.

JavaScript / TypeScript

4 libraries
LightOn every plan — Free, Student & up
lodashv4.17.21

Utility helpers for arrays, objects, and functions.

dayjsv1.11.10

Tiny immutable date library with a Moment-like API.

zodv3.23.8

TypeScript-first schema validation.

HeavyBasic, Pro & Trial · includes everything in Light
mathjsv12.4.1

Extensive math library: matrices, units, symbolic algebra.

Request a library

Need something that isn't here? Tell us what and why — the libraries people ask for most get added.