pip install blinker==1.4

Fast, simple object-to-object and broadcast signaling

Source
Among top 1000 packages on PyPI.
Over 17.8M downloads in the last 90 days.

Commonly used with blinker

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

Flask-Mail

Flask extension for sending email

Flask-Principal

Identity management for flask

WTForms

A flexible forms validation and rendering library for Python web development.

Flask-Security

Simple security for Flask apps.

Flask-Login

User session management for Flask

Flask-DebugToolbar

A toolbar overlay for debugging Flask applications.

Flask-WTF

Simple integration of Flask and WTForms.

Flask-Admin

Simple and extensible admin interface framework for Flask

Flask-Assets

Asset management for Flask, to compress and merge CSS and Javascript files.

rtoml

A better TOML library for python implemented in rust.

Flask-Cache

Adds cache support to your Flask application

WTForms-Components

Additional fields, validators and widgets for WTForms.

passlib

comprehensive password hashing framework supporting over 30 schemes

jsmin

JavaScript minifier.

Flask-Uploads

Flexible and efficient upload handling for Flask

Flask-Gravatar

Small extension for Flask to make usage of Gravatar service easy.

py-bcrypt

bcrypt password hashing and key derivation

WTForms-Alchemy

Generates WTForms forms from SQLAlchemy models.

Flask-BabelEx

Adds i18n/l10n support to Flask applications

Version usage of blinker

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

1.4

99.43%