'Iterate over the labels associated with this issue.
:param int number: (optional), number of labels to return. Default: -1
returns all labels applied to this issue.
:param str etag: (optional), ETag from a previous request to the same
endpoint
:returns: generator of :class:`Label <github3.issues.label.Label>`\ s'

def labels(self, number=(-1), etag=None):

    url = self._build_url(u'labels', base_url=self._api)
    return self._iter(int(number), url, Label, etag=etag)
