Fix python warnings: Use collections.abc instead collectionsjjardon/warnings_collections

Since python 3.3, collections has been moved to collections.abc module.
For backwards compatibility, they continue to be visible in this module through Python 3.7.
Subsequently, they will be removed entirely.

See https://docs.python.org/3/library/collections.html

1 files changed, 1 insertions, 1 deletions

diff --git a/tests/yaml/yaml.py b/tests/yaml/yaml.py
index a944c0e36..26515caee 100644
--- a/tests/yaml/yaml.py
+++ b/tests/yaml/yaml.py
@@ -1,7 +1,7 @@
 import os
 import pytest
 import tempfile
-from collections import Mapping
+from collections.abc import Mapping
 
 from buildstream import _yaml
 from buildstream._exceptions import LoadError, LoadErrorReason