'Iterate over the public keys of this user.
.. versionadded:: 0.5
:param int number: (optional), number of keys to return. Default: -1
returns all available keys
:param str etag: (optional), ETag from a previous request to the same
endpoint
:returns: generator of :class:`Key <Key>`\ s'

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

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