mirror of
https://github.com/evennia/evennia.git
synced 2026-03-18 13:56:30 +01:00
220 lines
No EOL
14 KiB
HTML
220 lines
No EOL
14 KiB
HTML
|
||
<!DOCTYPE html>
|
||
|
||
<html>
|
||
<head>
|
||
<meta charset="utf-8" />
|
||
<meta name="viewport" content="width=device-width, initial-scale=1.0" /><meta name="generator" content="Docutils 0.17.1: http://docutils.sourceforge.net/" />
|
||
|
||
<title>Coding Introduction — Evennia 0.9.5 documentation</title>
|
||
<link rel="stylesheet" href="_static/nature.css" type="text/css" />
|
||
<link rel="stylesheet" href="_static/pygments.css" type="text/css" />
|
||
<script id="documentation_options" data-url_root="./" src="_static/documentation_options.js"></script>
|
||
<script src="_static/jquery.js"></script>
|
||
<script src="_static/underscore.js"></script>
|
||
<script src="_static/doctools.js"></script>
|
||
<script src="_static/language_data.js"></script>
|
||
<script async="async" src="https://cdnjs.cloudflare.com/ajax/libs/mathjax/2.7.7/latest.js?config=TeX-AMS-MML_HTMLorMML"></script>
|
||
<script type="text/x-mathjax-config">MathJax.Hub.Config({"tex2jax": {"processClass": "tex2jax_process|mathjax_process|math|output_area"}})</script>
|
||
<link rel="shortcut icon" href="_static/favicon.ico"/>
|
||
<link rel="index" title="Index" href="genindex.html" />
|
||
<link rel="search" title="Search" href="search.html" />
|
||
</head><body>
|
||
<div class="related" role="navigation" aria-label="related navigation">
|
||
<h3>Navigation</h3>
|
||
<ul>
|
||
<li class="right" style="margin-right: 10px">
|
||
<a href="genindex.html" title="General Index"
|
||
accesskey="I">index</a></li>
|
||
<li class="right" >
|
||
<a href="py-modindex.html" title="Python Module Index"
|
||
>modules</a> |</li>
|
||
<li class="nav-item nav-item-0"><a href="index.html">Evennia 0.9.5</a> »</li>
|
||
<li class="nav-item nav-item-this"><a href="">Coding Introduction</a></li>
|
||
</ul>
|
||
</div>
|
||
|
||
<div class="document">
|
||
<div class="documentwrapper">
|
||
<div class="bodywrapper">
|
||
<div class="body" role="main">
|
||
|
||
<section class="tex2jax_ignore mathjax_ignore" id="coding-introduction">
|
||
<h1>Coding Introduction<a class="headerlink" href="#coding-introduction" title="Permalink to this headline">¶</a></h1>
|
||
<p>Evennia allows for a lot of freedom when designing your game - but to code efficiently you still
|
||
need to adopt some best practices as well as find a good place to start to learn.</p>
|
||
<p>Here are some pointers to get you going.</p>
|
||
<section id="python">
|
||
<h2>Python<a class="headerlink" href="#python" title="Permalink to this headline">¶</a></h2>
|
||
<p>Evennia is developed using Python. Even if you are more of a designer than a coder, it is wise to
|
||
learn how to read and understand basic Python code. If you are new to Python, or need a refresher,
|
||
take a look at our two-part <a class="reference internal" href="Python-basic-introduction.html"><span class="doc std std-doc">Python introduction</span></a>.</p>
|
||
</section>
|
||
<section id="explore-evennia-interactively">
|
||
<h2>Explore Evennia interactively<a class="headerlink" href="#explore-evennia-interactively" title="Permalink to this headline">¶</a></h2>
|
||
<p>When new to Evennia it can be hard to find things or figure out what is available. Evennia offers a
|
||
special interactive python shell that allows you to experiment and try out things. It’s recommended
|
||
to use <a class="reference external" href="http://ipython.org/">ipython</a> for this since the vanilla python prompt is very limited. Here
|
||
are some simple commands to get started:</p>
|
||
<div class="highlight-none notranslate"><div class="highlight"><pre><span></span># [open a new console/terminal]
|
||
# [activate your evennia virtualenv in this console/terminal]
|
||
pip install ipython # [only needed the first time]
|
||
cd mygame
|
||
evennia shell
|
||
</pre></div>
|
||
</div>
|
||
<p>This will open an Evennia-aware python shell (using ipython). From within this shell, try</p>
|
||
<div class="highlight-none notranslate"><div class="highlight"><pre><span></span>import evennia
|
||
evennia.<TAB>
|
||
</pre></div>
|
||
</div>
|
||
<p>That is, enter <code class="docutils literal notranslate"><span class="pre">evennia.</span></code> and press the <code class="docutils literal notranslate"><span class="pre"><TAB></span></code> key. This will show you all the resources made
|
||
available at the top level of Evennia’s “flat API”. See the <a class="reference internal" href="Evennia-API.html"><span class="doc std std-doc">flat API</span></a> page for more
|
||
info on how to explore it efficiently.</p>
|
||
<p>You can complement your exploration by peeking at the sections of the much more detailed
|
||
<a class="reference internal" href="Developer-Central.html"><span class="doc std std-doc">Developer Central</span></a>. The <a class="reference internal" href="Tutorials.html"><span class="doc std std-doc">Tutorials</span></a> section also contains a growing collection
|
||
of system- or implementation-specific help.</p>
|
||
</section>
|
||
<section id="use-a-python-syntax-checker">
|
||
<h2>Use a python syntax checker<a class="headerlink" href="#use-a-python-syntax-checker" title="Permalink to this headline">¶</a></h2>
|
||
<p>Evennia works by importing your own modules and running them as part of the server. Whereas Evennia
|
||
should just gracefully tell you what errors it finds, it can nevertheless be a good idea for you to
|
||
check your code for simple syntax errors <em>before</em> you load it into the running server. There are
|
||
many python syntax checkers out there. A fast and easy one is
|
||
<a class="reference external" href="https://pypi.python.org/pypi/pyflakes">pyflakes</a>, a more verbose one is
|
||
<a class="reference external" href="http://www.pylint.org/">pylint</a>. You can also check so that your code looks up to snuff using
|
||
<a class="reference external" href="https://pypi.python.org/pypi/pep8">pep8</a>. Even with a syntax checker you will not be able to catch
|
||
every possible problem - some bugs or problems will only appear when you actually run the code. But
|
||
using such a checker can be a good start to weed out the simple problems.</p>
|
||
</section>
|
||
<section id="plan-before-you-code">
|
||
<h2>Plan before you code<a class="headerlink" href="#plan-before-you-code" title="Permalink to this headline">¶</a></h2>
|
||
<p>Before you start coding away at your dream game, take a look at our <a class="reference internal" href="Game-Planning.html"><span class="doc std std-doc">Game Planning</span></a>
|
||
page. It might hopefully help you avoid some common pitfalls and time sinks.</p>
|
||
</section>
|
||
<section id="code-in-your-game-folder-not-in-the-evennia-repository">
|
||
<h2>Code in your game folder, not in the evennia/ repository<a class="headerlink" href="#code-in-your-game-folder-not-in-the-evennia-repository" title="Permalink to this headline">¶</a></h2>
|
||
<p>As part of the Evennia setup you will create a game folder to host your game code. This is your
|
||
home. You should <em>never</em> need to modify anything in the <code class="docutils literal notranslate"><span class="pre">evennia</span></code> library (anything you download
|
||
from us, really). You import useful functionality from here and if you see code you like, copy&paste
|
||
it out into your game folder and edit it there.</p>
|
||
<p>If you find that Evennia doesn’t support some functionality you need, make a
|
||
<a class="reference external" href="https://github.com/evennia/evennia/issues/new/choose">Feature Request</a> about it. Same goes for <a class="reference external" href="https://github.com/evennia/evennia/issues/new/choose">bugs</a>. If you add features or fix bugs
|
||
yourself, please consider <a class="reference internal" href="Contributing.html"><span class="doc std std-doc">Contributing</span></a> your changes upstream!</p>
|
||
</section>
|
||
<section id="learn-to-read-tracebacks">
|
||
<h2>Learn to read tracebacks<a class="headerlink" href="#learn-to-read-tracebacks" title="Permalink to this headline">¶</a></h2>
|
||
<p>Python is very good at reporting when and where things go wrong. A <em>traceback</em> shows everything you
|
||
need to know about crashing code. The text can be pretty long, but you usually are only interested
|
||
in the last bit, where it says what the error is and at which module and line number it happened -
|
||
armed with this info you can resolve most problems.</p>
|
||
<p>Evennia will usually not show the full traceback in-game though. Instead the server outputs errors
|
||
to the terminal/console from which you started Evennia in the first place. If you want more to show
|
||
in-game you can add <code class="docutils literal notranslate"><span class="pre">IN_GAME_ERRORS</span> <span class="pre">=</span> <span class="pre">True</span></code> to your settings file. This will echo most (but not all)
|
||
tracebacks both in-game as well as to the terminal/console. This is a potential security problem
|
||
though, so don’t keep this active when your game goes into production.</p>
|
||
<blockquote>
|
||
<div><p>A common confusing error is finding that objects in-game are suddenly of the type <code class="docutils literal notranslate"><span class="pre">DefaultObject</span></code>
|
||
rather than your custom typeclass. This happens when you introduce a critical Syntax error to the
|
||
module holding your custom class. Since such a module is not valid Python, Evennia can’t load it at
|
||
all. Instead of crashing, Evennia will then print the full traceback to the terminal/console and
|
||
temporarily fall back to the safe <code class="docutils literal notranslate"><span class="pre">DefaultObject</span></code> until you fix the problem and reload.</p>
|
||
</div></blockquote>
|
||
</section>
|
||
<section id="docs-are-here-to-help-you">
|
||
<h2>Docs are here to help you<a class="headerlink" href="#docs-are-here-to-help-you" title="Permalink to this headline">¶</a></h2>
|
||
<p>Some people find reading documentation extremely dull and shun it out of principle. That’s your
|
||
call, but reading docs really <em>does</em> help you, promise! Evennia’s documentation is pretty thorough
|
||
and knowing what is possible can often give you a lot of new cool game ideas. That said, if you
|
||
can’t find the answer in the docs, don’t be shy to ask questions! The
|
||
<a class="reference external" href="https://sites.google.com/site/evenniaserver/discussions">discussion group</a> and the
|
||
<a class="reference external" href="http://webchat.freenode.net/?channels=evennia">irc chat</a> are also there for you.</p>
|
||
</section>
|
||
<section id="the-most-important-point">
|
||
<h2>The most important point<a class="headerlink" href="#the-most-important-point" title="Permalink to this headline">¶</a></h2>
|
||
<p>And finally, of course, have fun!</p>
|
||
</section>
|
||
</section>
|
||
|
||
|
||
<div class="clearer"></div>
|
||
</div>
|
||
</div>
|
||
</div>
|
||
<div class="sphinxsidebar" role="navigation" aria-label="main navigation">
|
||
<div class="sphinxsidebarwrapper">
|
||
<p class="logo"><a href="index.html">
|
||
<img class="logo" src="_static/evennia_logo.png" alt="Logo"/>
|
||
</a></p>
|
||
<div id="searchbox" style="display: none" role="search">
|
||
<h3 id="searchlabel">Quick search</h3>
|
||
<div class="searchformwrapper">
|
||
<form class="search" action="search.html" method="get">
|
||
<input type="text" name="q" aria-labelledby="searchlabel" />
|
||
<input type="submit" value="Go" />
|
||
</form>
|
||
</div>
|
||
</div>
|
||
<script>$('#searchbox').show(0);</script>
|
||
<p><h3><a href="index.html">Table of Contents</a></h3>
|
||
<ul>
|
||
<li><a class="reference internal" href="#">Coding Introduction</a><ul>
|
||
<li><a class="reference internal" href="#python">Python</a></li>
|
||
<li><a class="reference internal" href="#explore-evennia-interactively">Explore Evennia interactively</a></li>
|
||
<li><a class="reference internal" href="#use-a-python-syntax-checker">Use a python syntax checker</a></li>
|
||
<li><a class="reference internal" href="#plan-before-you-code">Plan before you code</a></li>
|
||
<li><a class="reference internal" href="#code-in-your-game-folder-not-in-the-evennia-repository">Code in your game folder, not in the evennia/ repository</a></li>
|
||
<li><a class="reference internal" href="#learn-to-read-tracebacks">Learn to read tracebacks</a></li>
|
||
<li><a class="reference internal" href="#docs-are-here-to-help-you">Docs are here to help you</a></li>
|
||
<li><a class="reference internal" href="#the-most-important-point">The most important point</a></li>
|
||
</ul>
|
||
</li>
|
||
</ul>
|
||
|
||
<div role="note" aria-label="source link">
|
||
<!--h3>This Page</h3-->
|
||
<ul class="this-page-menu">
|
||
<li><a href="_sources/Coding-Introduction.md.txt"
|
||
rel="nofollow">Show Page Source</a></li>
|
||
</ul>
|
||
</div><h3>Links</h3>
|
||
<ul>
|
||
<li><a href="https://www.evennia.com">Home page</a> </li>
|
||
<li><a href="https://github.com/evennia/evennia">Evennia Github</a> </li>
|
||
<li><a href="http://games.evennia.com">Game Index</a> </li>
|
||
<li><a href="http://webchat.freenode.net/?channels=evennia&uio=MT1mYWxzZSY5PXRydWUmMTE9MTk1JjEyPXRydWUbb">IRC</a> -
|
||
<a href="https://discord.gg/NecFePw">Discord</a> -
|
||
<a href="https://groups.google.com/forum/#%21forum/evennia">Forums</a>
|
||
</li>
|
||
<li><a href="http://evennia.blogspot.com/">Evennia Dev blog</a> </li>
|
||
</ul>
|
||
<h3>Versions</h3>
|
||
<ul>
|
||
<li><a href="../1.0-dev/index.html">1.0-dev (develop branch)</a></li>
|
||
<li><a href="Coding-Introduction.html">0.9.5 (v0.9.5 branch)</a></li>
|
||
</ul>
|
||
|
||
|
||
</div>
|
||
</div>
|
||
<div class="clearer"></div>
|
||
</div>
|
||
<div class="related" role="navigation" aria-label="related navigation">
|
||
<h3>Navigation</h3>
|
||
<ul>
|
||
<li class="right" style="margin-right: 10px">
|
||
<a href="genindex.html" title="General Index"
|
||
>index</a></li>
|
||
<li class="right" >
|
||
<a href="py-modindex.html" title="Python Module Index"
|
||
>modules</a> |</li>
|
||
<li class="nav-item nav-item-0"><a href="index.html">Evennia 0.9.5</a> »</li>
|
||
<li class="nav-item nav-item-this"><a href="">Coding Introduction</a></li>
|
||
</ul>
|
||
</div>
|
||
<div class="footer" role="contentinfo">
|
||
© Copyright 2020, The Evennia developer community.
|
||
Created using <a href="https://www.sphinx-doc.org/">Sphinx</a> 3.2.1.
|
||
</div>
|
||
</body>
|
||
</html> |