Error creating anonymous gist

[jwass]

Hello,
Creating an anonymous gist following the code in the docs (https://github3.readthedocs.io/en/develop/examples/gist.html#creating-an-anonymous-gist) results in the following error:

>>> import github3
>>> github3.__version__
'1.0.1'
>>> gh = github3.GitHub()
>>> files = {
...     'spam.txt' : {
...         'content': 'What... is the air-speed velocity of an unladen swallow?'
...         }
...     }
>>>
>>> gist = gh.create_gist('Answer this to cross the bridge', files)
Traceback (most recent call last):
  File "/Users/jwass/.pyenv/versions/geojsonio3/lib/python3.5/site-packages/github3/models.py", line 48, in __init__
    self._update_attributes(json)
  File "/Users/jwass/.pyenv/versions/geojsonio3/lib/python3.5/site-packages/github3/gists/gist.py", line 325, in _update_attributes
    super(Gist, self)._update_attributes(gist)
  File "/Users/jwass/.pyenv/versions/geojsonio3/lib/python3.5/site-packages/github3/gists/gist.py", line 51, in _update_attributes
    self.owner = users.ShortUser(gist['owner'], self)
KeyError: 'owner'

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
  File "/Users/jwass/.pyenv/versions/geojsonio3/lib/python3.5/site-packages/github3/github.py", line 305, in create_gist
    return self._instance_or_null(gists.Gist, json)
  File "/Users/jwass/.pyenv/versions/geojsonio3/lib/python3.5/site-packages/github3/models.py", line 146, in _instance_or_null
    return instance_class(json, self)
  File "/Users/jwass/.pyenv/versions/geojsonio3/lib/python3.5/site-packages/github3/models.py", line 50, in __init__
    raise exceptions.IncompleteResponse(json, kerr)
github3.exceptions.IncompleteResponse: None The library was expecting more data in the response (KeyError('owner',)). Either GitHub modified it's response body, or your token is not properly scoped to retrieve this information.

[omgjlk]

So... GitHub is removing the ability to create anonymous gists. https://blog.github.com/2018-02-18-deprecation-notice-removing-anonymous-gist-creation/

We'll need to clean up this code to remove the method all together. There may be an actual bug lurking here in the return from attempting to create one, but instead of chasing that down I'm just going to remove the method.

[jwass]

Oof. I didn't know this. Bummer - but I guess it makes sense for Github to remove them.