Only use yaml CLoader if it is available

lsst · Jul 9, 2020 · 30d6426 · 30d6426
1 parent b64dc88
commit 30d6426
Showing 1 changed file with 9 additions and 1 deletion.
diff --git a/python/lsst/sphgeom/_yaml.py b/python/lsst/sphgeom/_yaml.py
@@ -33,7 +33,15 @@
 from .q3cPixelization import Q3cPixelization
 from .mq3cPixelization import Mq3cPixelization
 
-YamlLoaders = (yaml.Loader, yaml.CLoader, yaml.FullLoader, yaml.SafeLoader, yaml.UnsafeLoader)
+try:
+    # CLoader is not always available
+    from yaml import CLoader
+except ModuleNotFoundError:
+    CLoader = None
+
+YamlLoaders = (yaml.Loader, yaml.FullLoader, yaml.SafeLoader, yaml.UnsafeLoader)
+if CLoader is not None:
+    YamlLoaders += (CLoader,)
 
 
 # Regions