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kien is a line-based command parser for creating shell-like interfaces

Project description

kien logo

kien is python3 library that allows you to create a custom line-based command parser with the goal of creating shell-like interfaces. kien is not a shell and doesn’t try to be.

If you want to provide an human and machine friendly text-based interface on a serial device kien is for you. kien’s best-case scenario: you’re just writing the code that actually does things.

Please note that kien is under active development and does not have a stable API yet. Breaking changes will occur between minor versions as long as we didn’t publish v1.0.0 but will be documented in the changelog.

kien has support for:

  • (optional) keywords
  • variables
  • validation
  • transformation
  • auto-generated help and documentation
  • dependency-injection
  • human-readable and json output
  • tty handling

Prompt example showing how the say-some-name example works in action


kien mostly works by annotating functions with decorators. See the examples folder 😊

# run examples with pipenv
pipenv run example examples/

# or using your shell powers 
# (install dependencies first or initialize and load a virtualenv) 
PYTHONPATH=. python3 examples/

Work in progress

  • There are currently no tests

    This is not because there shouldn’t be but because kien just recently has been extracted from an application that only tests the actual commands that kien executes. In this sense there are tests that cover most of kien’s functionality but they simple are not public. That being said: kien should and will have tests in the future.

  • Output formatting & Terminal handling

    The way kien handles the terminal and how it writes and formats text are hard-coded and in some need for careful thought and refactoring.

  • There is little documentation

Say my name

kien is a pun and a homage to Commander Keen, because kien’s integral part is called a Commander. kien also is a rather old way to refer to a pine tree in german. There you go :)

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