Piou – Build beautiful command-line interfaces with type validation

In plain words

Piou is a tool for building command-line interfaces with built-in type validation. It enables developers to create structured CLI applications by defining typed arguments and options. The tool handles input parsing and validation automatically, reducing boilerplate code when constructing command-line programs. Piou is designed for developers who want to streamline CLI development with type safety.

written from the facts on this page · September 2026

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