TOML implementations: As mentioned above, the best TOML parser for Python currently appears to be pytoml. It's TOML v0.4.0 compliant, passes the TOML test suite (which appears to give pytoml >90% statement coverage), and the complete parser is 300 lines of code (plus another 100 lines for the TOML writing support). (Compare to PyYAML, which is >4200 lines of code.) Nominally, pyyaml only supports Python 2.7 and 3.4+, while pip also supports 2.6 and 3.3. It turns out that this is trivially fixable, though: it took me about 15 minutes to add 2.6 and 3.3 support.