diff options
Diffstat (limited to 'lib/spack/external/ruamel/yaml/comments.py')
| -rw-r--r-- | lib/spack/external/ruamel/yaml/comments.py | 7 |
1 files changed, 6 insertions, 1 deletions
diff --git a/lib/spack/external/ruamel/yaml/comments.py b/lib/spack/external/ruamel/yaml/comments.py index b8a5010ad8..a517072087 100644 --- a/lib/spack/external/ruamel/yaml/comments.py +++ b/lib/spack/external/ruamel/yaml/comments.py @@ -9,7 +9,12 @@ these are not really related, formatting could be factored out as a separate base """ -from collections import MutableSet +import sys + +if sys.version_info >= (3, 3): + from collections.abc import MutableSet +else: + from collections import MutableSet __all__ = ["CommentedSeq", "CommentedMap", "CommentedOrderedMap", "CommentedSet", 'comment_attrib', 'merge_attrib'] |