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Work with XML documents as if they were Python objects

Project Description

mappet

Mappet has been created to enable an easy an intuitive way to work with XML structures in Python code.

A well known lxml module has been used under the hood, mainly due to XML parsing performance.

Mappet accepts a string with valid XML, an lxml.etree._Element object or a dict representing the XML tree.

>>> import mappet
>>> f = open('example.xml', 'r')
>>> m = mappet.Mappet(f.read())

As an example, an XML document of the following structure has been used:

<?xml version='1.0' encoding='iso-8859-2'?>
<a-message>
    <head>
        <id seq="20" tstamp="2015-07-13T10:55:25+02:00"/>
        <initiator>Mr Sender</initiator>
        <date>2015-07-13T10:56:05.597420+02:00</date>
        <type>reply-type</type>
    </head>
    <auth>
        <user first-name="Name" last-name="LastName">id</user>
    </auth>
    <status>
        <result>OK</result>
    </status>
    <reply>
        <cars>
            <Car>
                <id>12345</id>
                <Manufacturer>BMW</Manufacturer>
                <Model_Name>X6</Model_Name>
                <Body>SUV</Body>
                <Fuel>Diesel</Fuel>
                <Doors>5</Doors>
                <ccm>3000</ccm>
                <HP>256</HP>
                <TransType>Automatic</TransType>
                <seats>5</seats>
                <weight>3690</weight>
            </Car>
            <Car>
                <id>54321</id>
                <Manufacturer>BMW</Manufacturer>
                <Model_Name>X1</Model_Name>
                <Body>SUV</Body>
                <Fuel>Diesel</Fuel>
                <Doors>5</Doors>
                <ccm>3000</ccm>
                <HP>198</HP>
                <TransType>Automatic</TransType>
                <seats>5</seats>
                <weight>2890</weight>
            </Car>
        </cars>
    </reply>
</a-message>

Conventions

Every XML node can be accessed in two ways: by attribute and item access.

Dictionary access:

Dictionary access is possible thanks to XML document being represented as a Python dictionary. Conversion of values is done explicitly.

By default, values are returned as str.

>>> m['reply']['cars']['Car'][0]['Manufacturer']
'BMW'

Nodes’ names are case-sensitive.

Attribute access:

Due to restrictions in Python variable names, tag names are normalized for attribute access. Tag names are normalized to lowercase and hyphens to underlines.

Same example using attribute access (__repr__ is responsible for representing the tag):

>>> m.reply.cars.car[0].manufacturer
BMW

To get a string representation use get().

>>> m.reply.cars.car[0].manufacturer.get()
'BMW'

get() has two parameters, default and callback. The first one is returned when then node’s value is empty, the second is a function to be called upon the returned value.

>>> m.reply.cars.car[0].ccm.get(callback=int)
3000

Alternatively, one can use built-in helper functions, defined in helpers.py

>>> m.reply.cars.car[0].ccm.to_int()
3000

Helper functions

  • to_bool
  • to_int
  • to_str
  • to_string
  • to_float
  • to_time
  • to_datetime
  • to_date
Release History

Release History

This version
History Node

0.1.2

History Node

0.1.1

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File Name & Checksum SHA256 Checksum Help Version File Type Upload Date
mappet-0.1.2-py2-none-any.whl (13.7 kB) Copy SHA256 Checksum SHA256 py2 Wheel Aug 27, 2015
mappet-0.1.2.tar.gz (10.7 kB) Copy SHA256 Checksum SHA256 Source Aug 27, 2015

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