jsonschema is an implementation of JSON Schema
for Python (supporting 2.6+ including Python 3).
>>> from jsonschema import validate
>>> # A sample schema, like what we'd get from json.load()
>>> schema = {
... "type" : "object",
... "properties" : {
... "price" : {"type" : "number"},
... "name" : {"type" : "string"},
... },
... }
>>> # If no exception is raised by validate(), the instance is valid.
>>> validate({"name" : "Eggs", "price" : 34.99}, schema)
>>> validate(
... {"name" : "Eggs", "price" : "Invalid"}, schema
... ) # doctest: +IGNORE_EXCEPTION_DETAIL
Traceback (most recent call last):
...
ValidationError: 'Invalid' is not of type 'number'- Full support for Draft 3 of the schema
- Lazy validation that can iteratively report all validation errors.
- Small and extensible
- Programmatic querying of which properties or items failed validation.
v0.8.0 introduces full support for JSON references via the RefResolver
object. It also removes all of the deprecated code from v0.7.
Other notable fixes are a fix for improper support of uniqueItems for
True and False (#34) and any for unknown types (#47).
Notably, there now exists some documentation (woo hoo!). It can be found at:
http://python-jsonschema.readthedocs.org
There are still a few incomplete sections, but it's mostly there. Patches welcome for weak points.
jsonschema uses the wonderful Tox for its
test suite. (It really is wonderful, if for some reason you haven't heard of
it, you really should use it for your projects).
Assuming you have tox installed (perhaps via pip install tox or your
package manager), just run tox in the directory of your source checkout to
run jsonschema's test suite on all of the versions of Python jsonschema
supports. Note that you'll need to have all of those versions installed in
order to run the tests on each of them, otherwise tox will skip (and fail)
the tests on that version.
I'm Julian Berman.
jsonschema is on GitHub.
Get in touch, via GitHub or otherwise, if you've got something to contribute, it'd be most welcome!
You can also generally find me on Freenode (nick: tos9) in various
channels, including #python.