ju

JSON schema Utils

To install: pip install ju

Documentation

Examples

JSON Schema

You have tools to extract JSON schema information from python objects, as well as to create python objects from them.

>>> from ju import signature_to_json_schema, json_schema_to_signature
>>>
>>>
>>> def earth(north: str, south: bool, east: int = 1, west: float = 2.0):
...     """Earth docs"""
...     return f'{north=}, {south=}, {east=}, {west=}'
...
>>> schema = signature_to_json_schema(earth)
>>> assert schema == {
...     'description': 'Earth docs',
...     'title': 'earth',
...     'type': 'object',
...     'properties': {
...         'north': {'type': 'string'},
...         'south': {'type': 'boolean'},
...         'east': {'type': 'integer', 'default': 1},
...         'west': {'type': 'number', 'default': 2.0},
...     },
...     'required': ['north', 'south'],
... }
>>>
>>> sig = json_schema_to_signature(schema)
>>> sig
<Sig (north: str, south: bool, east: int = 1, west: float = 2.0)>
>>> sig.name
'earth'
>>> sig.docs
'Earth docs'

React JSON Schema Form (rjsf)

You can get a react-jsonschema-form (rjsf) specification (see the rjsf playground) from a python function.

>>> def foo(
    ...     a_bool: bool,
    ...     a_float=3.14,
    ...     an_int=2,
    ...     a_str: str = 'hello',
    ...     something_else=None
    ... ):
    ...     '''A Foo function'''
    >>>
    >>> form_spec = func_to_form_spec(foo)
    >>> assert form_spec == {
    ...     'rjsf': {
    ...         'schema': {
    ...             'title': 'foo',
    ...             'type': 'object',
    ...             'properties': {
    ...                 'a_bool': {'type': 'boolean'},
    ...                 'a_float': {'type': 'number', 'default': 3.14},
    ...                 'an_int': {'type': 'integer', 'default': 2},
    ...                 'a_str': {'type': 'string', 'default': 'hello'},
    ...                 'something_else': {'type': 'string', 'default': None}
    ...             },
    ...             'required': ['a_bool'],
    ...             'description': 'A Foo function'
    ...         },
    ...         'uiSchema': {
    ...             'ui:submitButtonOptions': {
    ...                 'submitText': 'Run'
    ...             },
    ...             'a_bool': {'ui:autofocus': True}
    ...         },
    ...         'liveValidate': False,
    ...         'disabled': False,
    ...         'readonly': False,
    ...         'omitExtraData': False,
    ...         'liveOmit': False,
    ...         'noValidate': False,
    ...         'noHtml5Validate': False,
    ...         'focusOnFirstError': False,
    ...         'showErrorList': 'top'
    ...     }
    ... }

OpenAPI Routes

Represents a collection of routes in an OpenAPI specification.

Each instance of this class contains a list of Route objects, which can be accessed and manipulated as needed.

>>> from yaml import safe_load
>>> spec_yaml = '''
... openapi: 3.0.3
... paths:
...   /items:
...     get:
...       summary: List items
...       responses:
...         '200':
...           description: An array of items
...     post:
...       summary: Create item
...       responses:
...         '201':
...           description: Item created
... '''
>>> spec = safe_load(spec_yaml)
>>> routes = Routes(spec)
>>> len(routes)
2
>>> list(routes)
[('get', '/items'), ('post', '/items')]
>>> r = routes['get', '/items']
>>> r
Route(method='get', endpoint='/items')
>>> r.method_data
{'summary': 'List items', 'responses': {'200': {'description': 'An array of items'}}}