I'm about to upload an updated pyyaml. It adds deprecation warnings for unsafe pyyaml usage [1]. If you maintain a package that uses pyyaml, you should check and make sure it is using it in a safe way. Since it's a warning and not an error, I don't expect the update to actually break thins, but it's a good time to be checking.
I looked and python-yaml has over 100 rdepends, so this is not something I can check myself. Scott K [1] https://github.com/yaml/pyyaml/wiki/PyYAML-yaml.load(input)-Deprecation
