Pure array object can't be validated, throws TypeError: unhashable type: 'list' exception

[leonardopsantos]

Hi there! I'm trying to validate a JSON schema that represents a tensor shape. I modelled it as a list of four numbers. I want this schema separate because other schemas will use and and I don't want to redefine the shape as a 4-array more than once.

{
    "$schema": "https://json-schema.org/draft/2020-12/schema",
    "$id": "file:shape.schema.json",
    "title": "shape JSON schema",
    "description": "Schema for validating the serialization of a shape object",
    "type": "array",
    "minItems": 4,
    "maxItems": 4,
    "items": {
        "type": "number"
    }
}

I'm trying to validate it using the following Python code:

import unittest
import json

from jsonschema import validate

class TestShapeFormat(unittest.TestCase):
    """
    Sanity checks for the shape schema
    """
    def setUp(self):
        with open("shape.schema.json") as f:
            self.schema = json.load(f)

    def test_shape_format(self):
        validate(instance={[1,2,3,4]}, schema=self.schema)

if __name__ == "__main__":
    unittest.main()

The problem is that when I run that, I get a TypeError: unhashable type: 'list' exception:

self = <test_shape_format.TestShapeFormat testMethod=test_shape_format>

    def test_shape_format(self):
>       validate(instance={[1,2,3,4]}, schema=self.schema)
E       TypeError: unhashable type: 'list'

tests/test_shape_format.py:21: TypeError

I'm using jsonschema 4.1.0.

Thanks a lot!

[leonardopsantos]

My bad, the test should be:

validate(instance=[1,2,3,4], schema=self.schema)