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52 lines
1.5 KiB
Python
52 lines
1.5 KiB
Python
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# coding: utf-8
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from __future__ import unicode_literals
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from pathlib import Path
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from jsonschema import Draft4Validator
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from ...errors import Errors
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from ...util import read_json
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SCHEMAS = {}
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def get_schema(name):
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"""Get the JSON schema for a given name. Looks for a .json file in
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spacy.cli.schemas, validates the schema and raises ValueError if not found.
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EXAMPLE:
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>>> schema = get_schema('training')
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name (unicode): The name of the schema.
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RETURNS (dict): The JSON schema.
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"""
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if name not in SCHEMAS:
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schema_path = Path(__file__).parent / "{}.json".format(name)
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if not schema_path.exists():
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raise ValueError(Errors.E104.format(name=name))
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schema = read_json(schema_path)
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# TODO: replace with (stable) Draft6Validator, if available
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validator = Draft4Validator(schema)
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validator.check_schema(schema)
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SCHEMAS[name] = schema
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return SCHEMAS[name]
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def validate_json(data, schema):
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"""Validate data against a given JSON schema (see https://json-schema.org).
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data: JSON-serializable data to validate.
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schema (dict): The JSON schema.
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RETURNS (list): A list of error messages, if available.
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"""
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validator = Draft4Validator(schema)
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errors = []
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for err in sorted(validator.iter_errors(data), key=lambda e: e.path):
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if err.path:
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err_path = "[{}]".format(" -> ".join([str(p) for p in err.path]))
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else:
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err_path = ""
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errors.append(err.message + " " + err_path)
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return errors
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