docs | ||
json | ||
jsonschema | ||
.gitignore | ||
.travis.yml | ||
CHANGELOG.rst | ||
COPYING | ||
MANIFEST.in | ||
perftest | ||
README.rst | ||
setup.cfg | ||
setup.py | ||
tox.ini |
jsonschema
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):
...'Invalid' is not of type 'number' ValidationError:
Features
- Full support for Draft 3 and Draft 4 of the schema.
- Lazy validation that can iteratively report all validation errors.
- Small and extensible
- Programmatic querying of which properties or items failed validation.
Release Notes
v2.3.0
removes the (improper) limitation of
format
to strings. It also adds the jsonschema.exceptions.best_match
function which can be used to guess at the best matching single
validation error for a given instance.
>>> from jsonschema.validators import Draft4Validator
>>> from jsonschema.exceptions import best_match
>>> schema = {
"properties" : {
... "foo" : {"type" : "string"},
... "bar" : {"properties" : {"baz": {"type": "string"}}},
...
... },
... }>>> instance = {"foo" : 12, "bar": {"baz" : 19}}
>>> print(best_match(Draft4Validator(schema).iter_errors(instance)).path)
'foo']) deque([
where the error closer to the top of the instance in foo
was selected as being more relevant.
Also, URI references are now properly rejected by the URI format validator (i.e., it now only accepts full URIs, as defined in the specification).
Running the Test Suite
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.
Of course you're also free to just run the tests on a single version
with your favorite test runner. The tests live in the
jsonschema.tests
package.
Community
There's a mailing list for this implementation on Google Groups.
Please join, and feel free to send questions there.
Contributing
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
.
If you feel overwhelmingly grateful, you can woo me with beer money on Gittip or via Google Wallet with the email in my GitHub profile.