JSONSchema local self-reference (recursion) - jsonschema

Question

How can I reference a schema (B in this case) from itself no matter where it is nested?
I would like to be able to validate against schema A and against schema B. E.g.
from jsonschema import validate
validate(a, A)
validate(b, B)
Why? For unit tests and for speed improvements (if one of the B's fails I don't need to validate A).
Schema A references schema B and B references itself (see examples below).
I have tried the following:
a) Using definitions in A works only if validating against A. Validating B fails with jsonschema.exceptions.RefResolutionError: Unresolvable JSON pointer: 'definitions/b'. Which makes sense because the definition only exists on A.
from jsonschema import validate
B = {
"anyOf": [
{
"type": "object"
},
{
"type": "array",
"items": {"$ref": "#/definitions/b"}
}
]
}
A = {
"definitions": {
"b": B
},
"type": "array",
"items": {"$ref": "#/definitions/b"}
}
validate([], A)
validate([], B) # RefResolutionError
b) Using "$id": "http://example.org/B" in B and reference itself with: {"$ref": "http://example.org/B"} makes an actual (unnecessary http request) to a URL that does not exist. There is no need to make that request as the information is present in the document. Attempts using a non-url such as just #B fails with jsonschema.exceptions.RefResolutionError: unknown url type.
from jsonschema import validate
B = {
"$id": "http://example.org/schema/B",
"anyOf": [
{
"type": "object"
},
{
"type": "array",
"items": {"$ref": "http://example.org/schema/B"}
}
]
}
A = {
"type": "array",
"items": {"$ref": "http://example.org/schema/B"}
}
validate([{}], A) # RefResolutionError: HTTP Error 404: Not Found
validate([{}], B) # RefResolutionError: HTTP Error 404: Not Found

Answer 1

I had a problem kinda like this. I found upgrading my jsonschema module from somewhere in version 3 to jsonschema >= 4.3.2 fixed it immediately so may simply be a bug.
pip install --upgrade jsonschema