#
# Copyright (c) 2017 Philippe Proulx <pproulx@efficios.com>
-from bt2 import native_bt
-from bt2 import object as bt2_object
-from bt2 import utils as bt2_utils
+import uuid as uuidp
+import functools
import collections.abc
+
+from bt2 import error as bt2_error
+from bt2 import utils as bt2_utils
from bt2 import value as bt2_value
+from bt2 import object as bt2_object
from bt2 import stream as bt2_stream
+from bt2 import native_bt
from bt2 import stream_class as bt2_stream_class
-from bt2 import error as bt2_error
-
-import functools
-import uuid as uuidp
def _bt2_trace_class():