Werkzeug
========

*werkzeug* German noun: "tool". Etymology: *werk* ("work"), *zeug* ("stuff")

Werkzeug is a comprehensive `WSGI`_ web application library. It began as
a simple collection of various utilities for WSGI applications and has
become one of the most advanced WSGI utility libraries.

It includes:

-   An interactive debugger that allows inspecting stack traces and
    source code in the browser with an interactive interpreter for any
    frame in the stack.
-   A full-featured request object with objects to interact with
    headers, query args, form data, files, and cookies.
-   A response object that can wrap other WSGI applications and handle
    streaming data.
-   A routing system for matching URLs to endpoints and generating URLs
    for endpoints, with an extensible system for capturing variables
    from URLs.
-   HTTP utilities to handle entity tags, cache control, dates, user
    agents, cookies, files, and more.
-   A threaded WSGI server for use while developing applications
    locally.
-   A test client for simulating HTTP requests during testing without
    requiring running a server.

Werkzeug is Unicode aware and doesn't enforce any dependencies. It is up
to the developer to choose a template engine, database adapter, and even
how to handle requests. It can be used to build all sorts of end user
applications such as blogs, wikis, or bulletin boards.

`Flask`_ wraps Werkzeug, using it to handle the details of WSGI while
providing more structure and patterns for defining powerful
applications.


Installing
----------

Install and update using `pip`_:

.. code-block:: text

    pip install -U Werkzeug


A Simple Example
----------------

.. code-block:: python

    from werkzeug.wrappers import Request, Response

    @Request.application
    def application(request):
        return Response('Hello, World!')

    if __name__ == '__main__':
        from werkzeug.serving import run_simple
        run_simple('localhost', 4000, application)


Links
-----

-   Website: https://palletsprojects.com/p/werkzeug/
-   Documentation: https://werkzeug.palletsprojects.com/
-   Releases: https://pypi.org/project/Werkzeug/
-   Code: https://github.com/pallets/werkzeug
-   Issue tracker: https://github.com/pallets/werkzeug/issues
-   Test status: https://dev.azure.com/pallets/werkzeug/_build
-   Official chat: https://discord.gg/t6rrQZH

.. _WSGI: https://wsgi.readthedocs.io/en/latest/
.. _Flask: https://www.palletsprojects.com/p/flask/
.. _pip: https://pip.pypa.io/en/stable/quickstart/