CEL is a safe, fast, non-Turing complete expression language, great for things like configuration, validation rules, or policy engines where you need to evaluate user-defined logic without the security risks of eval(). You can install it via pip or uv: `uv tool install common-expression-language`

And run the REPL: cel -i

Or evaluate an expression directly: cel 'size(data.things) > 1' --context '{"data": {"things": [1,2,3]}}

Docs: https://python-common-expression-language.readthedocs.io/en/... Source: https://github.com/hardbyte/python-common-expression-languag...