response = openai.Engine(id="babbage-similarity").embeddings(
    input="Sample document text goes here"
)
embeddings = response['data'][0]['embedding']

Traceback (most recent call last):
  File "/home/whao/.virtualenv/openai/lib/python3.6/site-packages/openai/openai_object.py", line 96, in __getattr__
    return self[k]
  File "/home/whao/.virtualenv/openai/lib/python3.6/site-packages/openai/openai_object.py", line 136, in __getitem__
    raise err
  File "/home/whao/.virtualenv/openai/lib/python3.6/site-packages/openai/openai_object.py", line 124, in __getitem__
    return super(OpenAIObject, self).__getitem__(k)
KeyError: 'embeddings'

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
  File "/home/whao/.virtualenv/openai/lib/python3.6/site-packages/openai/openai_object.py", line 98, in __getattr__
    raise AttributeError(*err.args)
AttributeError: embeddings