pip install validators==0.18.2

Python Data Validation for Humans™.

Source
Among top 1000 packages on PyPI.
Over 8.4M downloads in the last 90 days.

Commonly used with validators

Based on how often these packages appear together in public requirements.txt files on GitHub.

intervals

Python tools for handling intervals (ranges of comparable objects).

infinity

All-in-one infinity value for Python. Can be compared to any object.

WTForms-Components

Additional fields, validators and widgets for WTForms.

WTForms-Alchemy

Generates WTForms forms from SQLAlchemy models.

Flask-Menu

Flask-Menu is a Flask extension that adds support for generating menus.

Flask-Email

Flask extension for sending email

Flask-CLI

Backport of Flask 1.0 new click integration.

Flask-Breadcrumbs

Flask-Breadcrumbs adds support for generating site breadcrumb navigation.

Flask-KVSession

Transparent server-side session support for flask

Flask-Collect

Flask-Collect -- Collect static files in Flask application

Flask-Alembic

Flask extension to integrate Alembic migrations

passlib

comprehensive password hashing framework supporting over 30 schemes

Flask-Registry

Flask-Registry is an extension for Flask that allow frameworks to dynamically assemble your Flask application from reusable packages consisting of blueprints, extensions, and configurations.

isbnid

Python ISBN ids

simplekv

A key-value storage for binary data, support many backends.

limits

Rate limiting utilities

SQLAlchemy-Continuum

Versioning and auditing extension for SQLAlchemy.

Flask-IIIF

Flask-IIIF extension provides easy IIIF API standard integration.

intbitset

C-based extension implementing fast integer bit sets.

Version usage of validators

Proportion of downloaded versions in the last 3 months (only versions over 1%).

0.18.2

89.73%

0.17.1

1.70%

0.18.1

1.39%

0.12.2

1.30%

0.14.0

1.23%