Think of WizLib as a framework, in that it provides a library of code that, when used in a conventional manner, provides a structure and capabilities to simplify application development.

Commands exist independently. To add a new command, simply add a Python file in the command directory with a class definition that inherits from the base command. The command will automatically appear as an option in usage, and the implementation has access to handlers for arguments, inputs, user interfaces, and values from a configuration file for the application.

A WizLib application has the following directory structure at a mimimum. In this case, the app is called Sample with the main command sample and one subcommand doit.

 ├─ .git
 └─ sample
     └─ command


WizLib itself defines several Python classes and functions for inclusion in projects. They include:

  • WizApp - Base class for a WizLib app
  • Command - Root class for the app-specific command class, which forms the base class for other commands
  • ConfigHandler - handles configuration, either through environment variables or a YAML configuration file
  • StreamHandler - simplifies handling of input via stdin for non-tty inputs such as pipes
  • ClassFamily - a primitive class that loads all subclasses in a directory into a "family" which can be queried a lookup, avoiding the need to include or reference every member of the family independently
  • SuperWrapper - a primitive class that "wraps" subclass methods, so that the superclass method gets calls before and after the subclass method - like an inversion of super()