Flask-WTF
Flask uses extensions in order to integrate transparently with third party libraries. WTForms with Flask-WTF is a good example of that as we will soon see. And, by the way, a Flask extension is a piece of code that integrates its configuration, context, and usage with Flask in a predictable way. That means extension usage is pretty similar. Now make sure Flask-WTF is installed in your virtual environment before continuing:
# oh god, so hard... not! pip flask-wtf
From http://flask-wtf.readthedocs.org/, the project website, we have the following list of features offered by Flask-WTF:
- Integration with WTForms
- Secure form with a CSRF token
- File upload that works with Flask-Uploads
- Global CSRF protection
- Recaptcha support
- Internationalization integration ...
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