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<div class="section" id="pyxb-python-xml-schema-bindings">
<h1>PyXB: Python XML Schema Bindings<a class="headerlink" href="#pyxb-python-xml-schema-bindings" title="Permalink to this headline">¶</a></h1>
<p>PyXB (“pixbee”) is a pure <a class="reference external" href="http://www.python.org">Python</a> package that
generates Python source code for classes that correspond to data structures
defined by <a class="reference external" href="http://www.w3.org/XML/Schema">XMLSchema</a>. The generated classes
support bi-directional conversion between <a class="reference external" href="http://www.w3.org/XML/">XML</a>
documents and Python objects. In concept it is similar to <a class="reference external" href="http://en.wikipedia.org/wiki/JAXB">JAXB</a> for Java and <a class="reference external" href="http://www.codesynthesis.com/products/xsd/">CodeSynthesis XSD</a> for C++. A
<a class="reference internal" href="#thirty-sec-example"><em>Thirty Second Example</em></a> is at the bottom of this page. Step-by-step
examples are in <a class="reference external" href="userref_index.html#userreference"><em>User Reference</em></a>.</p>
<div class="section" id="getting-help">
<h2>Getting Help<a class="headerlink" href="#getting-help" title="Permalink to this headline">¶</a></h2>
<p>PyXB is distributed on <a class="reference external" href="http://sourceforge.net/projects/pyxb">SourceForge</a>.</p>
<p>For support, consult the <a class="reference external" href="https://sourceforge.net/projects/pyxb/forums/forum/956708">Help Forum</a>, or subscribe to
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<p>To file a bug report or see the status of defects reported against the current
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<p>For a history of releases, see <a class="reference external" href="releases.html#releases"><em>Release History</em></a>.</p>
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<div class="section" id="contents">
<h2>Contents<a class="headerlink" href="#contents" title="Permalink to this headline">¶</a></h2>
<ul>
<li class="toctree-l1"><a class="reference external" href="overview.html">Overview</a><ul>
<li class="toctree-l2"><a class="reference external" href="overview_what.html">What Is PyXB?</a></li>
<li class="toctree-l2"><a class="reference external" href="overview_how.html">How to use it</a></li>
<li class="toctree-l2"><a class="reference external" href="bundles.html">Examples of Supported Schema</a></li>
<li class="toctree-l2"><a class="reference external" href="limitations.html">Limitations</a></li>
<li class="toctree-l2"><a class="reference external" href="legal.html">License and Disclaimers</a></li>
<li class="toctree-l2"><a class="reference external" href="vision.html">PyXB Vision</a></li>
<li class="toctree-l2"><a class="reference external" href="related.html">Related Packages</a></li>
</ul>
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<li class="toctree-l1"><a class="reference external" href="examples.html">Examples</a><ul>
<li class="toctree-l2"><a class="reference external" href="examples.html#dictionary-aonaware">Dictionary (Aonaware)</a></li>
<li class="toctree-l2"><a class="reference external" href="examples.html#simple-weather-cdyne">Simple Weather (CDyne)</a></li>
<li class="toctree-l2"><a class="reference external" href="examples.html#professional-weather-national-digital-forecast-data">Professional Weather (National Digital Forecast Data)</a></li>
<li class="toctree-l2"><a class="reference external" href="examples.html#television-schedules-tribune-media-services">Television Schedules (Tribune Media Services)</a></li>
<li class="toctree-l2"><a class="reference external" href="examples.html#address-to-latitude-longitude-http-geocoder-us">Address-To-Latitude/Longitude (http://geocoder.us)</a></li>
<li class="toctree-l2"><a class="reference external" href="examples.html#opengis-http-www-opengeospatial-org">OpenGIS (http://www.opengeospatial.org)</a></li>
</ul>
</li>
<li class="toctree-l1"><a class="reference external" href="releases.html">Release History</a><ul>
<li class="toctree-l2"><a class="reference external" href="releases.html#x-beta">1.1.x (Beta)</a></li>
<li class="toctree-l2"><a class="reference external" href="releases.html#x-stable">1.0.x (Stable)</a></li>
<li class="toctree-l2"><a class="reference external" href="releases.html#id1">0.7.x (Beta)</a></li>
<li class="toctree-l2"><a class="reference external" href="releases.html#id2">0.5.x (Beta)</a></li>
<li class="toctree-l2"><a class="reference external" href="releases.html#id3">0.4.x (Stable)</a></li>
<li class="toctree-l2"><a class="reference external" href="releases.html#id4">0.2.x (Stable)</a></li>
</ul>
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<li class="toctree-l1"><a class="reference external" href="architecture.html">Architecture</a><ul>
<li class="toctree-l2"><a class="reference external" href="arch_namespaces.html">Namespaces</a></li>
<li class="toctree-l2"><a class="reference external" href="arch_component.html">Component Model</a></li>
<li class="toctree-l2"><a class="reference external" href="arch_binding.html">Binding Model</a></li>
<li class="toctree-l2"><a class="reference external" href="arch_content.html">Content Model</a></li>
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<li class="toctree-l1"><a class="reference external" href="userref_index.html">User Reference</a><ul>
<li class="toctree-l2"><a class="reference external" href="userref_pyxbgen.html">Generating Binding Classes</a></li>
<li class="toctree-l2"><a class="reference external" href="userref_usebind.html">Using Binding Classes</a></li>
<li class="toctree-l2"><a class="reference external" href="pyxbgen_cli.html"><tt class="docutils literal"><span class="pre">pyxbgen</span></tt> Command Line Options</a></li>
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<li class="toctree-l1"><a class="reference external" href="maintref.html">Maintainer Reference</a><ul>
<li class="toctree-l2"><a class="reference external" href="maintref.html#the-api">The API</a></li>
<li class="toctree-l2"><a class="reference external" href="maintref.html#coding-practices">Coding Practices</a></li>
</ul>
</li>
</ul>
</div>
<div class="section" id="thirty-second-example">
<span id="thirty-sec-example"></span><h2>Thirty Second Example<a class="headerlink" href="#thirty-second-example" title="Permalink to this headline">¶</a></h2>
<p>An example of a program using PyXB to interact with a <a class="reference external" href="http://wiki.cdyne.com/wiki/index.php?title=CDYNE_Weather">web service</a> using an
automatically-generated module. First, retrieve the WSDL and generate the
bindings:</p>
<div class="highlight-python"><pre>mnservices[4]$ pyxbgen \
--wsdl-location="http://ws.cdyne.com/WeatherWS/Weather.asmx?wsdl" --module=weather \
--write-for-customization
urn:uuid:57d386ce-bb48-11de-a28f-001cc05930fc
Retrieving WSDL from http://ws.cdyne.com/WeatherWS/Weather.asmx?wsdl
Importing pyxb.binding.datatypes to get binding for wildcard {http://www.w3.org/2001/XMLSchema}schema
NOTE: Created unbound wildcard element from DOM node {http://www.w3.org/2001/XMLSchema}schema
PS urn:uuid:57d386ce-bb48-11de-a28f-001cc05930fc
Python for http://ws.cdyne.com/WeatherWS/ requires 1 modules
Saved binding source to ./raw/weather.py
mnservices[5]$</pre>
</div>
<p>Then write a program that uses them:</p>
<div class="highlight-python"><div class="highlight"><pre><span class="kn">import</span> <span class="nn">time</span>
<span class="kn">import</span> <span class="nn">urllib2</span>
<span class="kn">import</span> <span class="nn">weather</span> <span class="c"># Bindings generated by PyXB</span>
<span class="kn">import</span> <span class="nn">pyxb.utils.domutils</span> <span class="kn">as</span> <span class="nn">domutils</span>
<span class="n">uri</span> <span class="o">=</span> <span class="s">'http://ws.cdyne.com/WeatherWS/Weather.asmx/GetCityForecastByZIP?ZIP=85711'</span>
<span class="n">xml</span> <span class="o">=</span> <span class="n">urllib2</span><span class="o">.</span><span class="n">urlopen</span><span class="p">(</span><span class="n">uri</span><span class="p">)</span><span class="o">.</span><span class="n">read</span><span class="p">()</span>
<span class="n">doc</span> <span class="o">=</span> <span class="n">domutils</span><span class="o">.</span><span class="n">StringToDOM</span><span class="p">(</span><span class="n">xml</span><span class="p">)</span>
<span class="n">fc_return</span> <span class="o">=</span> <span class="n">weather</span><span class="o">.</span><span class="n">CreateFromDOM</span><span class="p">(</span><span class="n">doc</span><span class="o">.</span><span class="n">documentElement</span><span class="p">)</span>
<span class="k">if</span> <span class="n">fc_return</span><span class="o">.</span><span class="n">Success</span><span class="p">:</span>
<span class="k">print</span> <span class="s">'Weather forecast for </span><span class="si">%s</span><span class="s">, </span><span class="si">%s</span><span class="s">:'</span> <span class="o">%</span> <span class="p">(</span><span class="n">fc_return</span><span class="o">.</span><span class="n">City</span><span class="p">,</span> <span class="n">fc_return</span><span class="o">.</span><span class="n">State</span><span class="p">)</span>
<span class="k">for</span> <span class="n">fc</span> <span class="ow">in</span> <span class="n">fc_return</span><span class="o">.</span><span class="n">ForecastResult</span><span class="o">.</span><span class="n">Forecast</span><span class="p">:</span>
<span class="n">when</span> <span class="o">=</span> <span class="n">time</span><span class="o">.</span><span class="n">strftime</span><span class="p">(</span><span class="s">'%A, %B </span><span class="si">%d</span><span class="s"> %Y'</span><span class="p">,</span> <span class="n">fc</span><span class="o">.</span><span class="n">Date</span><span class="o">.</span><span class="n">timetuple</span><span class="p">())</span>
<span class="n">outlook</span> <span class="o">=</span> <span class="n">fc</span><span class="o">.</span><span class="n">Desciption</span> <span class="c"># typos in WSDL left unchanged</span>
<span class="n">low</span> <span class="o">=</span> <span class="n">fc</span><span class="o">.</span><span class="n">Temperatures</span><span class="o">.</span><span class="n">MorningLow</span>
<span class="n">high</span> <span class="o">=</span> <span class="n">fc</span><span class="o">.</span><span class="n">Temperatures</span><span class="o">.</span><span class="n">DaytimeHigh</span>
<span class="k">print</span> <span class="s">' </span><span class="si">%s</span><span class="s">: </span><span class="si">%s</span><span class="s">, from </span><span class="si">%s</span><span class="s"> to </span><span class="si">%s</span><span class="s">'</span> <span class="o">%</span> <span class="p">(</span><span class="n">when</span><span class="p">,</span> <span class="n">outlook</span><span class="p">,</span> <span class="n">low</span><span class="p">,</span> <span class="n">high</span><span class="p">)</span>
</pre></div>
</div>
<p>And run it:</p>
<div class="highlight-python"><pre>mnservices[5]$ python client_get.py
Weather forecast for Tucson, AZ:
Saturday, October 17 2009: Sunny, from to 98
Sunday, October 18 2009: Partly Cloudy, from 68 to 96
Monday, October 19 2009: Partly Cloudy, from 67 to 91
Tuesday, October 20 2009: Sunny, from 65 to 88
Wednesday, October 21 2009: Sunny, from 59 to 86
Thursday, October 22 2009: Sunny, from 58 to 87
Friday, October 23 2009: Sunny, from 60 to 8
mnservices[6]$</pre>
</div>
<p>That’s it.</p>
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<div class="section" id="indices-and-tables">
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<li><a class="reference external" href="#getting-help">Getting Help</a></li>
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<li><a class="reference external" href="#thirty-second-example">Thirty Second Example</a></li>
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