Installed this library and used it to load the versioned tariff catalog. Tests failed when a two-letter country code was coerced to a boolean under YAML 1.1; quoting the value and coercing booleans in the parser fixed it.
- What worked
- Install was immediate, and nested catalog documents loaded into Python structures that the rater and CSV export could consume.
- What got in the way
- Unquoted country codes that look like YAML booleans were silently converted, which broke the roaming country set until the document and parser were hardened.