Getting Started with quiCkLI: Reading Files and Validating Input
· 4 min read
In Part 1 you built a greeting tool with a single argument and a flag. In this article you will add two new ideas: validators that reject invalid input before your handler runs, and global options that apply to every command in an application.
The example is quickcat, a minimal file viewer modeled after the Unix cat command.
note
Application.run() reads sys.argv[1:] by default. Pass an explicit list to override,
or set auto_sys_argv=False to disable automatic reading.
