According to the strictyaml author (https://github.com/crdoconnor/strictyaml/blob/master/FAQ.rst#why-is-strictyaml-built-upon-ruamelyaml): “ruamel.yaml is probably the best spec-adhering YAML parser for python.

Unlike pyyaml it does not require the C yaml library to be installed, and it is capable of loading, editing and saving YAML while preserving comments, which pyyaml does not.”

A Python wrapper to YAJL providing standard iterator interface to streaming JSON parsing

ConfigObj is a simple but powerful config file reader and writer: an ini file round tripper. Its main feature is that it is very easy to use, with a straightforward programmer's interface and a simple syntax for config files

Need to unserialize XML config files...

lxml is a Pythonic binding for the libxml2 and libxslt libraries

Python parser for HTML and XML documents.