PyXB: Python XML Schema Bindings

PyXB (“pixbee”) is a pure Python package that generates Python source code for classes that correspond to data structures defined by XMLSchema. The generated classes support bi-directional conversion between XML documents and Python objects. In concept it is similar to JAXB for Java and CodeSynthesis XSD for C++. A Thirty Second Example is at the bottom of this page. Step-by-step examples are in User Reference.

Getting Help

PyXB is distributed on SourceForge.

For support, consult the Help Forum, or subscribe to and email the mailing list.

To file a bug report or see the status of defects reported against the current release, visit the Trac database.

For a history of releases, see Release History.

Thirty Second Example

An example of a program using PyXB to interact with a web service using an automatically-generated module. First, retrieve the WSDL and generate the bindings:

llc[766]$ pyxbgen \
      --wsdl-location= \
      --module=weather \
Retrieving WSDL from
WARNING:pyxb.binding.basis:Unable to convert DOM node {}schema at Weather.asmx?WSDL[4:4] to binding
PS urn:uuid:ea640f34-4869-11e2-924d-c8600024e903
WARNING:pyxb.binding.generate:Complex type {}ArrayOfWeatherDescription renamed to ArrayOfWeatherDescription_
WARNING:pyxb.binding.generate:Complex type {}ForecastReturn renamed to ForecastReturn_
WARNING:pyxb.binding.generate:Complex type {}WeatherReturn renamed to WeatherReturn_
Python for requires 1 modules

Then write a program that uses them:

import time
import urllib2
import weather   # Bindings generated by PyXB
import pyxb.utils.domutils as domutils

uri = ''
xml = urllib2.urlopen(uri).read()
doc = domutils.StringToDOM(xml)
fc_return = weather.CreateFromDOM(doc.documentElement)
if fc_return.Success:
    print 'Weather forecast for %s, %s:' % (fc_return.City, fc_return.State)
    for fc in fc_return.ForecastResult.Forecast:
        when = time.strftime('%A, %B %d %Y', fc.Date.timetuple())
        outlook = fc.Desciption # typos in WSDL left unchanged
        low = fc.Temperatures.MorningLow
        high = fc.Temperatures.DaytimeHigh
        print '  %s: %s, from %s to %s' % (when, outlook, low, high)

And run it:

llc[767]$ python
Weather forecast for Saint Paul, MN:
 Monday, December 17 2012: Partly Cloudy, from 15 to 26
 Tuesday, December 18 2012: , from 19 to 32
 Wednesday, December 19 2012: Partly Cloudy, from 18 to 32
 Thursday, December 20 2012: Mostly Cloudy, from 16 to 22
 Friday, December 21 2012: Sunny, from 8 to 20
 Saturday, December 22 2012: Partly Cloudy, from 8 to 21
 Sunday, December 23 2012: Partly Cloudy, from 3 to 19

That’s it.

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