'dict_keys' object does not support indexing

[crudo10]

Function _example_from_array_spec in swagger_parser.py contains the following line:
return example_dict[example_dict.keys()[0]]
which throws

TypeError: 'dict_keys' object does not support indexing

error in Python 3 since example_dict.keys() returns a view object not a list.
It should be something like example_dict[list(example_dict)[0]] in order to work for Python 3.