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<h1>Flask Documentation<a class="headerlink" href="#flask-documentation" title="Permalink to this headline"></a></h1>
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<h2>User’s Guide<a class="headerlink" href="#user-s-guide" title="Permalink to this headline"></a></h2>
<p>This part of the documentation, which is mostly prose, begins with some
background information about Flask, then focuses on step-by-step
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<li class="toctree-l1"><a class="reference internal" href="signals.html">Signals</a><ul>
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<li class="toctree-l1"><a class="reference internal" href="views.html">Pluggable Views</a><ul>
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<li class="toctree-l1"><a class="reference internal" href="appcontext.html">The Application Context</a><ul>
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<li class="toctree-l1"><a class="reference internal" href="extensions.html">Flask Extensions</a><ul>
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<li class="toctree-l2"><a class="reference internal" href="shell.html#further-improving-the-shell-experience">Further Improving the Shell Experience</a></li>
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<li class="toctree-l1"><a class="reference internal" href="patterns/index.html">Patterns for Flask</a><ul>
<li class="toctree-l2"><a class="reference internal" href="patterns/packages.html">Larger Applications</a></li>
<li class="toctree-l2"><a class="reference internal" href="patterns/appfactories.html">Application Factories</a></li>
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<li class="toctree-l2"><a class="reference internal" href="patterns/urlprocessors.html">Using URL Processors</a></li>
<li class="toctree-l2"><a class="reference internal" href="patterns/distribute.html">Deploying with Setuptools</a></li>
<li class="toctree-l2"><a class="reference internal" href="patterns/fabric.html">Deploying with Fabric</a></li>
<li class="toctree-l2"><a class="reference internal" href="patterns/sqlite3.html">Using SQLite 3 with Flask</a></li>
<li class="toctree-l2"><a class="reference internal" href="patterns/sqlalchemy.html">SQLAlchemy in Flask</a></li>
<li class="toctree-l2"><a class="reference internal" href="patterns/fileuploads.html">Uploading Files</a></li>
<li class="toctree-l2"><a class="reference internal" href="patterns/caching.html">Caching</a></li>
<li class="toctree-l2"><a class="reference internal" href="patterns/viewdecorators.html">View Decorators</a></li>
<li class="toctree-l2"><a class="reference internal" href="patterns/wtforms.html">Form Validation with WTForms</a></li>
<li class="toctree-l2"><a class="reference internal" href="patterns/templateinheritance.html">Template Inheritance</a></li>
<li class="toctree-l2"><a class="reference internal" href="patterns/flashing.html">Message Flashing</a></li>
<li class="toctree-l2"><a class="reference internal" href="patterns/jquery.html">AJAX with jQuery</a></li>
<li class="toctree-l2"><a class="reference internal" href="patterns/errorpages.html">Custom Error Pages</a></li>
<li class="toctree-l2"><a class="reference internal" href="patterns/lazyloading.html">Lazily Loading Views</a></li>
<li class="toctree-l2"><a class="reference internal" href="patterns/mongokit.html">MongoKit in Flask</a></li>
<li class="toctree-l2"><a class="reference internal" href="patterns/favicon.html">Adding a favicon</a></li>
<li class="toctree-l2"><a class="reference internal" href="patterns/streaming.html">Streaming Contents</a></li>
<li class="toctree-l2"><a class="reference internal" href="patterns/deferredcallbacks.html">Deferred Request Callbacks</a></li>
<li class="toctree-l2"><a class="reference internal" href="patterns/methodoverrides.html">Adding HTTP Method Overrides</a></li>
<li class="toctree-l2"><a class="reference internal" href="patterns/requestchecksum.html">Request Content Checksums</a></li>
<li class="toctree-l2"><a class="reference internal" href="patterns/celery.html">Celery Based Background Tasks</a></li>
<li class="toctree-l2"><a class="reference internal" href="patterns/subclassing.html">Subclassing Flask</a></li>
</ul>
</li>
<li class="toctree-l1"><a class="reference internal" href="deploying/index.html">Deployment Options</a><ul>
<li class="toctree-l2"><a class="reference internal" href="deploying/index.html#hosted-options">Hosted options</a></li>
<li class="toctree-l2"><a class="reference internal" href="deploying/index.html#self-hosted-options">Self-hosted options</a></li>
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</li>
<li class="toctree-l1"><a class="reference internal" href="becomingbig.html">Becoming Big</a><ul>
<li class="toctree-l2"><a class="reference internal" href="becomingbig.html#read-the-source">Read the Source.</a></li>
<li class="toctree-l2"><a class="reference internal" href="becomingbig.html#hook-extend">Hook. Extend.</a></li>
<li class="toctree-l2"><a class="reference internal" href="becomingbig.html#subclass">Subclass.</a></li>
<li class="toctree-l2"><a class="reference internal" href="becomingbig.html#wrap-with-middleware">Wrap with middleware.</a></li>
<li class="toctree-l2"><a class="reference internal" href="becomingbig.html#fork">Fork.</a></li>
<li class="toctree-l2"><a class="reference internal" href="becomingbig.html#scale-like-a-pro">Scale like a pro.</a></li>
<li class="toctree-l2"><a class="reference internal" href="becomingbig.html#discuss-with-the-community">Discuss with the community.</a></li>
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</ul>
</div>
</div>
<div class="section" id="api-reference">
<h2>API Reference<a class="headerlink" href="#api-reference" title="Permalink to this headline"></a></h2>
<p>If you are looking for information on a specific function, class or
method, this part of the documentation is for you.</p>
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<li class="toctree-l1"><a class="reference internal" href="api.html">API</a><ul>
<li class="toctree-l2"><a class="reference internal" href="api.html#application-object">Application Object</a></li>
<li class="toctree-l2"><a class="reference internal" href="api.html#blueprint-objects">Blueprint Objects</a></li>
<li class="toctree-l2"><a class="reference internal" href="api.html#incoming-request-data">Incoming Request Data</a></li>
<li class="toctree-l2"><a class="reference internal" href="api.html#response-objects">Response Objects</a></li>
<li class="toctree-l2"><a class="reference internal" href="api.html#sessions">Sessions</a></li>
<li class="toctree-l2"><a class="reference internal" href="api.html#session-interface">Session Interface</a></li>
<li class="toctree-l2"><a class="reference internal" href="api.html#test-client">Test Client</a></li>
<li class="toctree-l2"><a class="reference internal" href="api.html#application-globals">Application Globals</a></li>
<li class="toctree-l2"><a class="reference internal" href="api.html#useful-functions-and-classes">Useful Functions and Classes</a></li>
<li class="toctree-l2"><a class="reference internal" href="api.html#message-flashing">Message Flashing</a></li>
<li class="toctree-l2"><a class="reference internal" href="api.html#module-flask.json">JSON Support</a></li>
<li class="toctree-l2"><a class="reference internal" href="api.html#template-rendering">Template Rendering</a></li>
<li class="toctree-l2"><a class="reference internal" href="api.html#configuration">Configuration</a></li>
<li class="toctree-l2"><a class="reference internal" href="api.html#extensions">Extensions</a></li>
<li class="toctree-l2"><a class="reference internal" href="api.html#stream-helpers">Stream Helpers</a></li>
<li class="toctree-l2"><a class="reference internal" href="api.html#useful-internals">Useful Internals</a></li>
<li class="toctree-l2"><a class="reference internal" href="api.html#signals">Signals</a></li>
<li class="toctree-l2"><a class="reference internal" href="api.html#class-based-views">Class-Based Views</a></li>
<li class="toctree-l2"><a class="reference internal" href="api.html#url-route-registrations">URL Route Registrations</a></li>
<li class="toctree-l2"><a class="reference internal" href="api.html#view-function-options">View Function Options</a></li>
<li class="toctree-l2"><a class="reference internal" href="api.html#command-line-interface">Command Line Interface</a></li>
</ul>
</li>
</ul>
</div>
</div>
<div class="section" id="additional-notes">
<h2>Additional Notes<a class="headerlink" href="#additional-notes" title="Permalink to this headline"></a></h2>
<p>Design notes, legal information and changelog are here for the interested.</p>
<div class="toctree-wrapper compound">
<ul>
<li class="toctree-l1"><a class="reference internal" href="design.html">Design Decisions in Flask</a><ul>
<li class="toctree-l2"><a class="reference internal" href="design.html#the-explicit-application-object">The Explicit Application Object</a></li>
<li class="toctree-l2"><a class="reference internal" href="design.html#the-routing-system">The Routing System</a></li>
<li class="toctree-l2"><a class="reference internal" href="design.html#one-template-engine">One Template Engine</a></li>
<li class="toctree-l2"><a class="reference internal" href="design.html#micro-with-dependencies">Micro with Dependencies</a></li>
<li class="toctree-l2"><a class="reference internal" href="design.html#thread-locals">Thread Locals</a></li>
<li class="toctree-l2"><a class="reference internal" href="design.html#what-flask-is-what-flask-is-not">What Flask is, What Flask is Not</a></li>
</ul>
</li>
<li class="toctree-l1"><a class="reference internal" href="htmlfaq.html">HTML/XHTML FAQ</a><ul>
<li class="toctree-l2"><a class="reference internal" href="htmlfaq.html#history-of-xhtml">History of XHTML</a></li>
<li class="toctree-l2"><a class="reference internal" href="htmlfaq.html#history-of-html5">History of HTML5</a></li>
<li class="toctree-l2"><a class="reference internal" href="htmlfaq.html#html-versus-xhtml">HTML versus XHTML</a></li>
<li class="toctree-l2"><a class="reference internal" href="htmlfaq.html#what-does-strict-mean">What does “strict” mean?</a></li>
<li class="toctree-l2"><a class="reference internal" href="htmlfaq.html#new-technologies-in-html5">New technologies in HTML5</a></li>
<li class="toctree-l2"><a class="reference internal" href="htmlfaq.html#what-should-be-used">What should be used?</a></li>
</ul>
</li>
<li class="toctree-l1"><a class="reference internal" href="security.html">Security Considerations</a><ul>
<li class="toctree-l2"><a class="reference internal" href="security.html#cross-site-scripting-xss">Cross-Site Scripting (XSS)</a></li>
<li class="toctree-l2"><a class="reference internal" href="security.html#cross-site-request-forgery-csrf">Cross-Site Request Forgery (CSRF)</a></li>
<li class="toctree-l2"><a class="reference internal" href="security.html#json-security">JSON Security</a></li>
</ul>
</li>
<li class="toctree-l1"><a class="reference internal" href="unicode.html">Unicode in Flask</a><ul>
<li class="toctree-l2"><a class="reference internal" href="unicode.html#automatic-conversion">Automatic Conversion</a></li>
<li class="toctree-l2"><a class="reference internal" href="unicode.html#the-golden-rule">The Golden Rule</a></li>
<li class="toctree-l2"><a class="reference internal" href="unicode.html#encoding-and-decoding-yourself">Encoding and Decoding Yourself</a></li>
<li class="toctree-l2"><a class="reference internal" href="unicode.html#configuring-editors">Configuring Editors</a></li>
</ul>
</li>
<li class="toctree-l1"><a class="reference internal" href="extensiondev.html">Flask Extension Development</a><ul>
<li class="toctree-l2"><a class="reference internal" href="extensiondev.html#anatomy-of-an-extension">Anatomy of an Extension</a></li>
<li class="toctree-l2"><a class="reference internal" href="extensiondev.html#hello-flaskext">“Hello Flaskext!”</a></li>
<li class="toctree-l2"><a class="reference internal" href="extensiondev.html#initializing-extensions">Initializing Extensions</a></li>
<li class="toctree-l2"><a class="reference internal" href="extensiondev.html#the-extension-code">The Extension Code</a></li>
<li class="toctree-l2"><a class="reference internal" href="extensiondev.html#using-app-ctx-stack">Using _app_ctx_stack</a></li>
<li class="toctree-l2"><a class="reference internal" href="extensiondev.html#teardown-behavior">Teardown Behavior</a></li>
<li class="toctree-l2"><a class="reference internal" href="extensiondev.html#learn-from-others">Learn from Others</a></li>
<li class="toctree-l2"><a class="reference internal" href="extensiondev.html#approved-extensions">Approved Extensions</a></li>
<li class="toctree-l2"><a class="reference internal" href="extensiondev.html#extension-import-transition">Extension Import Transition</a></li>
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<li class="toctree-l1"><a class="reference internal" href="styleguide.html">Pocoo Styleguide</a><ul>
<li class="toctree-l2"><a class="reference internal" href="styleguide.html#general-layout">General Layout</a></li>
<li class="toctree-l2"><a class="reference internal" href="styleguide.html#expressions-and-statements">Expressions and Statements</a></li>
<li class="toctree-l2"><a class="reference internal" href="styleguide.html#naming-conventions">Naming Conventions</a></li>
<li class="toctree-l2"><a class="reference internal" href="styleguide.html#docstrings">Docstrings</a></li>
<li class="toctree-l2"><a class="reference internal" href="styleguide.html#comments">Comments</a></li>
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<li class="toctree-l1"><a class="reference internal" href="python3.html">Python 3 Support</a></li>
<li class="toctree-l1"><a class="reference internal" href="upgrading.html">Upgrading to Newer Releases</a><ul>
<li class="toctree-l2"><a class="reference internal" href="upgrading.html#version-0-12">Version 0.12</a></li>
<li class="toctree-l2"><a class="reference internal" href="upgrading.html#version-0-11">Version 0.11</a></li>
<li class="toctree-l2"><a class="reference internal" href="upgrading.html#version-0-10">Version 0.10</a></li>
<li class="toctree-l2"><a class="reference internal" href="upgrading.html#version-0-9">Version 0.9</a></li>
<li class="toctree-l2"><a class="reference internal" href="upgrading.html#version-0-8">Version 0.8</a></li>
<li class="toctree-l2"><a class="reference internal" href="upgrading.html#version-0-7">Version 0.7</a></li>
<li class="toctree-l2"><a class="reference internal" href="upgrading.html#version-0-6">Version 0.6</a></li>
<li class="toctree-l2"><a class="reference internal" href="upgrading.html#version-0-5">Version 0.5</a></li>
<li class="toctree-l2"><a class="reference internal" href="upgrading.html#version-0-4">Version 0.4</a></li>
<li class="toctree-l2"><a class="reference internal" href="upgrading.html#version-0-3">Version 0.3</a></li>
</ul>
</li>
<li class="toctree-l1"><a class="reference internal" href="changelog.html">Flask Changelog</a><ul>
<li class="toctree-l2"><a class="reference internal" href="changelog.html#version-0-13">Version 0.13</a></li>
<li class="toctree-l2"><a class="reference internal" href="changelog.html#version-0-12-2">Version 0.12.2</a></li>
<li class="toctree-l2"><a class="reference internal" href="changelog.html#version-0-12-1">Version 0.12.1</a></li>
<li class="toctree-l2"><a class="reference internal" href="changelog.html#version-0-12">Version 0.12</a></li>
<li class="toctree-l2"><a class="reference internal" href="changelog.html#version-0-11-2">Version 0.11.2</a></li>
<li class="toctree-l2"><a class="reference internal" href="changelog.html#version-0-11-1">Version 0.11.1</a></li>
<li class="toctree-l2"><a class="reference internal" href="changelog.html#version-0-11">Version 0.11</a></li>
<li class="toctree-l2"><a class="reference internal" href="changelog.html#version-0-10-2">Version 0.10.2</a></li>
<li class="toctree-l2"><a class="reference internal" href="changelog.html#version-0-10-1">Version 0.10.1</a></li>
<li class="toctree-l2"><a class="reference internal" href="changelog.html#version-0-10">Version 0.10</a></li>
<li class="toctree-l2"><a class="reference internal" href="changelog.html#version-0-9">Version 0.9</a></li>
<li class="toctree-l2"><a class="reference internal" href="changelog.html#version-0-8-1">Version 0.8.1</a></li>
<li class="toctree-l2"><a class="reference internal" href="changelog.html#version-0-8">Version 0.8</a></li>
<li class="toctree-l2"><a class="reference internal" href="changelog.html#version-0-7-3">Version 0.7.3</a></li>
<li class="toctree-l2"><a class="reference internal" href="changelog.html#version-0-7-2">Version 0.7.2</a></li>
<li class="toctree-l2"><a class="reference internal" href="changelog.html#version-0-7-1">Version 0.7.1</a></li>
<li class="toctree-l2"><a class="reference internal" href="changelog.html#version-0-7">Version 0.7</a></li>
<li class="toctree-l2"><a class="reference internal" href="changelog.html#version-0-6-1">Version 0.6.1</a></li>
<li class="toctree-l2"><a class="reference internal" href="changelog.html#version-0-6">Version 0.6</a></li>
<li class="toctree-l2"><a class="reference internal" href="changelog.html#version-0-5-2">Version 0.5.2</a></li>
<li class="toctree-l2"><a class="reference internal" href="changelog.html#version-0-5-1">Version 0.5.1</a></li>
<li class="toctree-l2"><a class="reference internal" href="changelog.html#version-0-5">Version 0.5</a></li>
<li class="toctree-l2"><a class="reference internal" href="changelog.html#version-0-4">Version 0.4</a></li>
<li class="toctree-l2"><a class="reference internal" href="changelog.html#version-0-3-1">Version 0.3.1</a></li>
<li class="toctree-l2"><a class="reference internal" href="changelog.html#version-0-3">Version 0.3</a></li>
<li class="toctree-l2"><a class="reference internal" href="changelog.html#version-0-2">Version 0.2</a></li>
<li class="toctree-l2"><a class="reference internal" href="changelog.html#version-0-1">Version 0.1</a></li>
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<li class="toctree-l2"><a class="reference internal" href="license.html#flask-artwork-license">Flask Artwork License</a></li>
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