cmdliner

Cmdliner is a python command line parsing library focus on extending scripts/applications with command line parsing features while requiring miminal code for the setup.

Minimal Use Case

The minimal use case provides --version and -v(vv) for verbosity:

from cmdliner import cli, verbose

# You just need to decorate your "main" function with cli(version)
# version is a required argument, it will be used to provide --version
@cli("1.0")
def main():
    print("hello")
    verbose(1, "You see this with -v")


# Instead of calling your main function directly you call cli(), it will handle
# the argument parsing and invoke the previously decorated function
if __name__ == "__main__":
    cli()

Testing:

$ python test.py
hello
$ python test.py --version
test.py 1.0
$ python test.py -v
hello
You see this with -v

Using command line arguments

from cmdliner import cli


@cli("1.0")
def main(name, age):
    print(f"{name} is {age} years old")


if __name__ == "__main__":
    cli()

Result:

$ python test.py
Missing required command line parameter 'name' !
Usage:
  test.py <name> <age>
$ python test.py Joe 12
Joe is 12 years old

How to install

pip install cmdliner