Pepsi, when they don't have coke

A practical exploration of configuration language options for Python developers, focusing on Starlark as a sandboxed, Python-flavored DSL. The author compares common config formats (TOML, JSON, YAML) and dedicated languages (CueLang, Dhall, Jsonnet), explaining why CueLang is ideal but lacks Python bindings. Starlark is presented as a workable alternative via the starlark-pyo3 Rust-backed library, with code examples showing how to execute Starlark files from Python, expose callables, and implement a custom import loader. The conclusion is nuanced: Starlark is useful for exposing a sandboxed DSL to untrusted third parties, but for personal projects it adds too much ceremony without schema support, making plain Python config still preferable.