python-ruamel.yaml 0.10.23-1 (amd64 binary) in ubuntu xenial

 ruamel.yaml is a YAML parser supporting roundtrip preservation of
 comments, seq/map flow style and map key order. It is a derivative of
 Kirill Simonov's PyYAML 3.11 which supports YAML1.1.
 .
 This package contains the Python 2 module.