JsonVL
JsonVL is a JSON validator for Python. This project is intended to be a replacement for the jsonschema package which implements the JSON Schema standard. JsonVL's goal is to curate a rich set of validation methods for JSON data types while remaining extensible to new constraints.
Installation
Install the latest PyPI release:
pip install jsonvlUsage
Validate JSON files from the command line
jsonvl data.json schema.jsonValidate JSON files in Python
from jsonvl import validate_file
validate_file('data.json', 'schema.json')Validate in-memory JSON data in Python
from jsonvl import validate
validate(data, schema)Documentation
The JsonVL documentation is hosted by Read the Docs and is a work in progress.
Example
Below is an example pair of JSON data and JSON schema. More examples can be found in the examples folder.
Data
{
"play": "A Midsummer Night's Dream",
"characters": [
{ "name": "Helena", "loves": ["Demitrius"] },
{ "name": "Demitrius", "loves": ["Hermia", "Helena"] },
{ "name": "Hermia", "loves": ["Lysander"] },
{ "name": "Lysander", "loves": ["Hermia", "Helena", "Hermia"] },
{ "name": "Titania", "loves": ["Oberon", "Bottom", "Oberon"] },
{ "name": "Oberon", "loves": ["Titania"] },
{ "name": "Bottom", "loves": [] },
{ "name": "Puck", "loves": [] }
]
}Schema
{
"type": "object",
"attr": {
"play": "string",
"characters": {
"type": "array",
"cons": {
"unique": "@all.name"
},
"elem": {
"type": "object",
"attr": {
"name": "#name",
"loves": {
"type": "array",
"elem": "#name",
"cons": { "max_size": 4 }
}
}
}
}
},
"defs": {
"#name": {
"type": "string",
"cons": {
"format": { "type": "regex", "pattern": "[A-Z][a-z]{0,10}" }
}
}
}
}
