Click

BSD-3 composable command-line interfaces for Python

Python / Python · BSD-3-Clause · 17.8k

Reviewed 2026-10-18 · last push 2026-10-06 · repo checked 2026-10-19

What's Good

BSD-3-Clause (pallets/click), release 8.5.0 (2026-08-27), maintained since 2014 by the team behind Flask. Arbitrary command nesting, automatic help, lazy loading of subcommands and built-in testing helpers. It is the base of many CLIs and of Typer. ★~17.8k.

The Catch

Decorators are more verbose than Typer's type-hint style. Some behaviour changes between minor releases have broken downstream CLIs, so pin it. Rich output needs extra libraries.

Verdict

The proven foundation for Python CLIs.

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