A basic implementation for converting program arguments to dataclass instances.

simple_cli_parser.py

# Adapted from source: https://stackoverflow.com/a/71035314

from dataclasses import dataclass
from argparse import ArgumentParser

@dataclass
class BaseProgramArgs:
    @classmethod
    def from_args(cls, argument_parser: ArgumentParser):
        return cls(**vars(argument_parser.parse_args()))


'''
Example Usage:

python -m utils.cli_parser -a test -b 3
# Outputs 'ExampleProgramArgs(first_var='test', second_var=3)'
'''
if __name__ == '__main__':
    @dataclass
    class ExampleProgramArgs(BaseProgramArgs):
        first_var: str
        second_var: int

    parser = ArgumentParser('This CLI program uses type hints!')
    parser.add_argument('-a', '--first-var')
    parser.add_argument('-b', '--another-var', type=int, dest='second_var')

    args_obj = ExampleProgramArgs.from_args(parser)
    print(args_obj)