What is the license of this software ?

[fengints]

license shows this

Python 3.8.5 (Tue Jul 20 07:56:19 UTC 2021)
[Graal, GraalVM CE, Java 16.0.2] on linux
Type "help", "copyright", "credits" or "license" for more information.
>>> license
See https://www.python.org/psf/license/