Error creating SwaggerClient

[jonocodes]

Here is my code:

from swaggerpy.client import SwaggerClient
from swaggerpy.http_client import SynchronousHttpClient
http_client = SynchronousHttpClient()

client = ari = SwaggerClient("http://petstore.swagger.wordnik.com/api/api-docs",http_client=http_client)

Here is the error:

  File "/home/jfinger/Desktop/swagger-py/swaggerpy/client.py", line 178, in __init__
    self.api_docs = loader.load_resource_listing(url_or_resource)
  File "/home/jfinger/Desktop/swagger-py/swaggerpy/swagger_model.py", line 170, in load_resource_listing
    self.load_api_declaration(base_url, api)
  File "/home/jfinger/Desktop/swagger-py/swaggerpy/swagger_model.py", line 187, in load_api_declaration
    api_dict['url'] = urlparse.urljoin(base_url + '/', path.strip('/'))
TypeError: unsupported operand type(s) for +: 'NoneType' and 'str'

Looks like this is because the loader is looking for something called 'basePath' in the Json.