[python client] can't access fields that reference definition

My response contains an enum field (netAccessType in the example below). In the spec, the field is defined via "ref" for reuse purpose. This field is mapped to an empty list in the python object generated by the client instead of a string.

It appears this issue is not enum specific -- other types referenced are also empty.

Here's an example of spec:

...
accessType:
  type: string
  description: access type 
  enum:
    - public
    - private

...

NetworkConfig:
  properties:
    netAccessType:
      $ref : '#/definitions/accessType'
    ...

Start by reproducing Python client generation with the issue's NetworkConfig and accessType specification, then trace how referenced properties are handled. Done means referenced fields, including the enum example, are represented with their expected values instead of empty lists.