binary.py

#!/bin/env python

class Option(object):
    
    def __init__(self, key, name, expects_value):
        self.key = key
        self.name = name
        self.expects_value = expects_value

    def format_value(self, value):
        formatted_value = None
        if hasattr(value, "name"):
            formatted_value = file.name
        else:
            formatted_value = str(value)
        return formatted_value

class Binary(object):
    
    def __init__(self, path):
        self.path = path
        self.options = dict()

    def option(self, key, name, expects_value = True, value_type = None, hidden = False, default = None):
        self.options[key] = Option(key, name, expects_value)
        return self
    
    @staticmethod
    def __format_option(option, value):
        return [option.name, option.format_value(value)]
            
    def __call__(self, *args, **kwargs):
        arguments = [self.path]
        for key, value in kwargs.items():
            option = self.options[key]
            arguments += self.__format_option(option, value)
        arguments += args
        print(arguments)

    @classmethod
    def path(cls, path):
        return Binary(path)

if __name__ == "__main__":
    ffmpeg = Binary \
        .path("/usr/bin/ffmpeg") \
        .option("input", "-i", expects_value = True)

    ffmpeg(input = "test")