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-rw-r--r--taskflow/atom.py5
1 files changed, 3 insertions, 2 deletions
diff --git a/taskflow/atom.py b/taskflow/atom.py
index f356247..6e41204 100644
--- a/taskflow/atom.py
+++ b/taskflow/atom.py
@@ -17,6 +17,7 @@
import abc
import collections
+from collections import abc as cabc
import itertools
from oslo_utils import reflection
@@ -28,8 +29,8 @@ from taskflow.utils import misc
# Helper types tuples...
-_sequence_types = (list, tuple, collections.Sequence)
-_set_types = (set, collections.Set)
+_sequence_types = (list, tuple, cabc.Sequence)
+_set_types = (set, cabc.Set)
# the default list of revert arguments to ignore when deriving
# revert argument mapping from the revert method signature