class AgnosticGridOut(object):
    def __init__(
        self,
        root_collection,
        file_id=None,
        file_document=None,
        delegate=None,
    ):

 [2019/10/24 15:14:30.081] ERROR: test_alt_collection (test.test_gridfs_bucket.TestGridfs)
 [2019/10/24 15:14:30.081] ----------------------------------------------------------------------
 [2019/10/24 15:14:30.081] Traceback (most recent call last):
 [2019/10/24 15:14:30.081]   File "/data/mci/6ba00614a2279a83cbe73498853dcce9/src/.tox/synchro37/tmp/mongo-python-driver/test/test_gridfs_bucket.py", line 168, in test_alt_collection
 [2019/10/24 15:14:30.081]     self.alt.open_download_stream(oid).read())
 [2019/10/24 15:14:30.081]   File "/data/mci/6ba00614a2279a83cbe73498853dcce9/src/.tox/synchro37/tmp/mongo-python-driver/gridfs/__init__.py", line 690, in open_download_stream
 [2019/10/24 15:14:30.081]     gout = GridOut(self._collection, file_id, session=session)
 [2019/10/24 15:14:30.081] TypeError: __init__() got an unexpected keyword argument 'session'