Flask is a micro-framework that provides many of the features that are expected in a web framework. It is written in Python and uses the Werkzeug toolkit, Jinja 2 template engine, and SQLAlchemy for database support. It can be considered as an alternative to other frameworks like Django or CherryPy. Flask's key features include its simplicity, extensibility, and its use of components like Werkzeug, Jinja2 or SQLAlchemy.
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