Argon2 won the Password Hashing Competition and argon2_cffi is the simplest way to use it in Python and PyPy:
>>> from argon2 import PasswordHasher
>>> ph = PasswordHasher()
>>> hash = ph.hash("s3kr3tp4ssw0rd")
>>> hash # doctest: +SKIP
'$argon2id$v=19$m=512,t=2,p=2$Z0tsPw0iK7Ky2Iwp63HKBA$psMUXgYOIaAhaZ990uep8w'
>>> ph.verify(hash, "s3kr3tp4ssw0rd")
True
>>> ph.verify(hash, "t0t411ywr0ng")
Traceback (most recent call last):
...
argon2.exceptions.VerifyMismatchError: The password does not match the supplied hashNote
passlib 1.7.0 and later offers Argon2 support using this library too.
argon2_cffi’s documentation lives at Read the Docs, the code on GitHub.
It’s rigorously tested on Python 2.7, 3.4+, and PyPy.