XML as plain object module
XML as plain object utility module
This module is a set of utility functions for parsing self-contained XML input into plain list/dict/string types and emitting to/reading from XML or YAML formats.
The motivating usage was to dump XML to YAML, manually edit files as YAML, and emit XML output back.
Though this module can be used more simply to dump compatible plain list/dict/string objects into XML or YAML for textual storage.
An XML file content when read to object and written back to XML has all it's document strcuture and content preserved w.r.t. to elements start/end and text content. Though XML comments, document type specifications, external entity definitions are discarded if present on input. External system entities (i.e. inclusion of external files) are not supported and generate an input error.
The input XML is just syntactically validated and does not validate against any DTD or schema specification as the underlying backend is the core xml.sax module.
The only and optional destructive transformation on the document
content is a
strip_space option on reading (resp.
on writing) which can affect non-leaf text content (stripping
leading and trailing spaces).
The XML namespaces are ignored as there is no actual schema validation, hence element, attribute names and namespaces URIs attributes are passed and preserved as-is.
Note that there are alternative modules with nearly the same functionality, but none of them provide all of:
- simple plain objects (dict, list, strings) dumped to/reloaded from XML
- preservation of semi-structured XML documents (tags duplicates, mixed text and tags) on input
- management of human-editable form through YAML bridge
In order to convert a XML file to a YAML representation, for instance given
<example> <doc>This is an example for xmlobj documentation. </doc> <content version="beta"> <kind>document</kind> <class>example</class> <structured/> <elements> <item>Elt 1</item> <doc>Elt 2</doc> <item>Elt 3</item> <doc>Elt 4</doc> </elements> </content> </example>
Execute the following python code:
import xmlplain # Read to plain object with open("tests/example-1.xml") as inf: root = xmlplain.xml_to_obj(inf, strip_space=True, fold_dict=True) # Output plain YAML with open("example-1.yml", "w") as outf: xmlplain.obj_to_yaml(root, outf)
This will output the YAML representation in
example: doc: 'This is an example for xmlobj documentation. ' content: '@version': beta kind: document class: example structured: '' elements: - item: Elt 1 - doc: Elt 2 - item: Elt 3 - doc: Elt 4
One can then read the emitted YAML representation and generate again an XML output with:
import xmlplain # Read the YAML file with open("example-1.yml") as inf: root = xmlplain.obj_from_yaml(inf) # Output back XML with open("example-1.new.xml", "w") as outf: xmlplain.xml_from_obj(root, outf, pretty=True)
This will output back the following XML (there may be some indentation and/or short empty elements differences w.r.t. the original):
<?xml version="1.0" encoding="UTF-8"?> <example> <doc>This is an example for xmlobj documentation. </doc> <content version="beta"> <kind>document</kind> <class>example</class> <structured></structured> <elements> <item>Elt 1</item> <doc>Elt 2</doc> <item>Elt 3</item> <doc>Elt 4</doc> </elements> </content> </example>
For a detailled usage, read the API documentation with:
Or get to the online documentation at: https://guillon.github.io/xmlplain
The module is compatible with
python 2.6/2.7 and
For a local installation (installs to
pip install --user xmlplain
This will install the last release and its dependencies in your user environment.
Optionally install at system level with:
sudo pip install xlmplain
Download this module archives from the releases at: https://github.com/guillon/xmlplain/releases
Or clone the source git repository at: https://github.com/guillon/xmlplain
Installation from sources
Install first modules dependencies with:
pip install --user setuptools PyYAML ordereddict
Either copy the
xmlplain.py file somewhere or install it
For a user local installation (installs to
./setup.py install --user
This module is delivered as part of a source tree with tests, in order to run tests, do for instance:
make -j16 check
With python coverage installed, one may check coverage of changes with:
make -j16 coverage firefox tests/coverage/html/index.html
When check target pass and newly added code is covered, please submit a pull request to https://github.com/guillon/xmlplain
The documentation is generated with
sphinx as is:
make doc firefox html/index.html
The online documentation is hosted at: https://guillon.github.io/xmlplain
The release process relies on the virtualenv tool, python2 and python3 being installed on the release host.
The release builds, tests, do coverage checks on both python2 and python3 then generates documentation and uploadable archives for PyPi.
Before Bumping a release be sure to update the
xmlplain.py and commit it (no check is done against the version
in the release target).
Then Proceed as follow to prepare the release:
make -j16 release
When all this passes locally, commit all and push to github
next/master branch in order to have travis checks running.
Verify travis status before proceeding further, for instance
from the travis command line with:
Once all is passed, and the
make -j16 release target has been re-executed,
upload doc to github and packages to PyPI with:
One should check the proper installation on PyPi with:
make -j16 release-check
Which will restart a release check, this time downloading from PyPI instead of using the local sources.
After all is done, one should manually update the github with:
- Apply a tag
vx.y.zmatching the new release version and push it to github
- Go to github and finalize the tag promotion into a release with and at least upload
also on in the github release the source archive
xmlplain-x.y.x.tar.gzavailable on the just uploaded PyPi files: https://pypi.org/project/xmlplain/#files
- Optionally add some information and publish the release
This is free and unencumbered software released into the public domain.
Download the file for your platform. If you're not sure which to choose, learn more about installing packages.
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