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How to install jsonschema

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  2. Open Command Prompt
  3. Type pypm install jsonschema
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Author
License
MIT
Lastest release
version 2.0.0 on May 22nd, 2013

jsonschema is an implementation of JSON Schema for Python (supporting 2.6+ including Python 3).

System Message: ERROR/3 (<string>, line 8)

Unknown directive type "code-block".

.. code-block:: python

    >>> 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'


Features

Release Notes

v2.0.0 adds a better interface for creating and extending validators in the form of jsonschema.validators.create and jsonschema.validators.extend. The documentation is still a bit lacking in this area but it's getting there. See the tests in jsonschema.tests.test_validators and the source code if you'd like to try it out now. ValidatorMixin has been removed.

Practically speaking, this affects validators that subclassed a built-in validator and extended a validator function (presumably with an upcall via super), as the correct way to do so is now to call TheValidator.VALIDATORS["extended_validator_fn"] directly in a new validator function (and of course to use create). Examples hopefully coming soon if more clarification is needed. Patches welcome of course.

It also fixes a number of issues with ref resolution, one for array indices (#95) and one for improper handling of unknown URI schemes (#102).

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.

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Last updated May 22nd, 2013

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