I've generated python-flask SDK from petstore.yaml and hit the run time error summarized below. This worked fine with the swager-codegen and it seems "openapi" components is not found. It used to be "swagger". Maybe I'm missing some plugin or need a newer python? Any suggestions?

I've attached the complete backtrace.

Thanks
Frank

Traceback (most recent call last):
File "/usr/lib/python3.5/site-packages/swagger_spec_validator/common.py", line 24, in wrapper
return method(*args, **kwargs)
File "/usr/lib/python3.5/site-packages/swagger_spec_validator/validator20.py", line 141, in validate_json
cls=Draft4Validator,
File "/usr/lib/python3.5/site-packages/swagger_spec_validator/ref_validators.py", line 53, in validate
instance_cls(schema, *args, **kwargs).validate(instance)
File "/usr/lib/python3.5/site-packages/jsonschema/validators.py", line 130, in validate
raise error
jsonschema.exceptions.ValidationError: 'components', 'openapi', 'servers' do not match any of the regexes: '^x-'

Suggest a fix/enhancement

petstore_flask.txt