django.contrib.auth.password_validation.CommonPasswordValidator

Validate that the password is not a common password. The password is rejected if it occurs in a provided list of passwords, which may be gzipped. The list Django ships with contains 20000 common passwords (lowercased and deduplicated), created by Royce Williams: https://gist.github.com/roycewilliams/281ce539915a947a23db17137d91aeb7 The password list must be lowercased to match the comparison in validate().