show the full path of the error/warning in iter_errors

Start at openapi_v3_spec_validator.iter_errors and reproduce the reported output with the OpenAPI document and snippet in the issue. Trace how validation errors are formatted and verify that each emitted error includes the requested absolute path, including the shown parameters[4] location.

Hi everyone

I'm validating this open API: https://api.apis.guru/v2/specs/exlibrisgroup.com/tasklists/1.0/openapi.json and I need it to show me the absolute path of the error/warning instead, not only: {'default': '10', 'type': 'integer', 'nullable': False}
because the API is a little big and I want an easy way to trace the error/warning.

the code:

import json
import requests
from openapi_spec_validator import openapi_v3_spec_validator

with open('openapi.json', 'w') as file:
    file.write(requests.get('https://api.apis.guru/v2/specs/exlibrisgroup.com/tasklists/1.0/openapi.json').text)
    file.close()

with open('openapi.json', 'r') as file:
    schema = json.load(file)
    file.close()

errors = openapi_v3_spec_validator.iter_errors(schema)
for error in errors:
    print(error)
    print(error.schema, error.path, error.absolute_schema_path)
    print(error.relative_path, error.relative_schema_path, error.schema_path)
    break    

the output:

'10' is not of type integer

Failed validating 'type' in schema:
    {'default': '10', 'nullable': False, 'type': 'integer'}

On instance:
    '10'
{'default': '10', 'type': 'integer', 'nullable': False} deque([]) deque(['type'])
deque([]) deque(['type']) deque(['type'])

it would be nice if this output is also added to the message:
#/paths//almaws/v1/task-lists/printouts/get/parameters[4]