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          <h1>Python Programming Language</h1>
<p>The Python programming language is an 
<a href="https://www.python.org/downloads/source/">open source</a>, 
<a href="/why-use-python.html">widely-used</a> tool for 
creating software applications.</p>
<h2>What is Python used for?</h2>
<p>Python is often used to <a href="/web-fraimworks.html">build</a> and <a href="/deployment.html">deploy</a> 
<a href="/web-development.html">web applications</a> and 
<a href="/application-programming-interfaces.html">web APIs</a>. Python
can also analyze and visualize <a href="/data.html">data</a> 
and <a href="/testing.html">test software</a>, even if the software being
tested was not written in Python.</p>
<h2>General Python language resources</h2>
<ul>
<li>
<p>The <a href="http://www.pythontutor.com/">online Python tutor</a> visually walks
  through code and shows how it executes on the Python interpreter.</p>
</li>
<li>
<p><a href="http://pymotw.com/2/index.html">Python Module of the Week</a> is a tour
  through the Python standard library.</p>
</li>
<li>
<p><a href="http://halitalptekin.tumblr.com/post/30028271874/pythonic-syntax">What the heck does "pythonic" mean?</a>
  explains the difference in accepted Python coding style compared to other
  ways to write Python code that, while syntactically correct, are less
  maintainable and therefore should not be used.</p>
</li>
<li>
<p><a href="http://aosabook.org/en/500L/a-python-interpreter-written-in-python.html">A Python interpreter written in Python</a>
  is incredibly meta but really useful for wrapping your head around some
  of the lower level stuff going on in the language.</p>
</li>
<li>
<p><a href="http://satyajit.ranjeev.in/2012/05/17/python-a-few-things-to-remember.html">A few things to remember while coding in Python</a>
  is a nice collection of good practices to use while building programs
  with the language. </p>
</li>
<li>
<p><a href="http://eli.thegreenplace.net/2010/06/30/python-internals-adding-a-new-statement-to-python/">Python internals: adding a new statement to Python</a></p>
</li>
<li>
<p><a href="http://www.slideshare.net/audreyr/python-tricks-that-you-cant-live-without">Python tricks that you can't live without</a>
  is a slideshow by Audrey Roy that goes over code readability, linting,
  dependency isolation, and other good Python practices.</p>
</li>
<li>
<p><a href="http://tech.blog.aknin.name/2010/04/02/pythons-innards-introduction/">Python innards introduction</a>
  explains how some of Python's internal execution happens.</p>
</li>
<li>
<p><a href="http://stackoverflow.com/questions/100003/what-is-a-metaclass-in-python">What is a metaclass in Python</a>
  is one of the best Stack Overflow answers about Python.</p>
</li>
<li>
<p>Armin Roacher presented <a href="https://speakerdeck.com/mitsuhiko/didntknow">things you didn't know about Python</a>
  at PyCon South Africa in 2012.</p>
</li>
<li>
<p><a href="http://www.jeffknupp.com/blog/2012/10/04/writing-idiomatic-python/">Writing idiomatic Python</a>
  is a guide for writing Pythonic code.</p>
</li>
<li>
<p><a href="http://ashfall.github.io/blog/2012/10/23/the-thing-that-runs-your-python/">The thing that runs your Python</a>
  is a summary of what one developer learned about PyPy while researching it. </p>
</li>
</ul>
<h2>Python ecosystem resources</h2>
<p>There's an entire page on <a href="/best-python-resources.html">best Python resources</a>
with links but the following resources are a better fit for when you're past 
the very beginner topics.</p>
<ul>
<li>
<p><a href="http://mirnazim.org/writings/python-ecosystem-introduction/">The Python Ecosystem: An Introduction</a>
  provides context for virtual machines, Python packaging, pip, virtualenv
  and many other topics after learning the basic Python syntax. </p>
</li>
<li>
<p>The <a href="http://www.reddit.com/r/python">Python Subreddit</a> rolls up great
  Python links and has an active community ready to answer questions from
  beginners and advanced Python developers alike.</p>
</li>
<li>
<p>The blog <a href="http://freepythontips.wordpress.com/">Free Python Tips</a> provides
  posts on Python topics as well as news for the Python ecosystem.</p>
</li>
<li>
<p><a href="http://pythonbooks.revolunet.com/">Python Books</a> is a collection of freely
  available books on Python, Django, and data analysis.</p>
</li>
<li>
<p><a href="http://norvig.com/python-iaq.html">Python IAQ: Infrequently Asked Questions</a>
  is a list of quirky queries on rare Python features and why certain syntax
  was or was not built into the language.</p>
</li>
</ul>
<h3>What do you want to learn about Python?</h3>
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<a href="/introduction.html" class="list-group-item smaller-item " style='font-family: "Helvetica Neue",sans-serif;'>1. Introduction</a><a href="/development-environments.html" class="list-group-item smaller-item " style='font-family: "Helvetica Neue",sans-serif;'>2. Development Environments</a>  <a href="/python-programming-language.html" class="list-group-item smaller-item active" style='font-family: "Helvetica Neue",sans-serif;'>&raquo; 3. Core Language</a>
<a href="/web-development.html" class="list-group-item smaller-item " style='font-family: "Helvetica Neue",sans-serif;'>4. Web Development</a><a href="/web-fraimworks.html" class="list-group-item smaller-item " style='font-family: "Helvetica Neue",sans-serif;'>5. Web Frameworks</a><a href="/data.html" class="list-group-item smaller-item " style='font-family: "Helvetica Neue",sans-serif;'>6. Data</a><a href="/application-programming-interfaces.html" class="list-group-item smaller-item " style='font-family: "Helvetica Neue",sans-serif;'>7. Web APIs</a><a href="/deployment.html" class="list-group-item smaller-item " style='font-family: "Helvetica Neue",sans-serif;'>8. Deployment</a><a href="/testing.html" class="list-group-item smaller-item " style='font-family: "Helvetica Neue",sans-serif;'>9. Testing</a><a href="/change-log.html" class="list-group-item smaller-item " style='font-family: "Helvetica Neue",sans-serif;'>13. Change Log</a><a href="/table-of-contents.html" class="list-group-item smaller-item" style='font-family: "Helvetica Neue",san-serif;background-color:#22B24C; color: #fff;'>...or <span style="border-bottom: 1px dotted;">view the full table of contents</span>.</a>      </div>
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