Determine access member of object

is it possible to determine which variable access through object. So we can give information at run time about variable used into program. For creating such scenario I have created following files. Please provide your input.

#!/usr/bin/env python

    class Test(object):
        """Base args"""
        def __init__(self):
            self.args = "dummy"
            self.parser = "test"
            self.sub_parser = ""

    if __name__ == '__main__':
        base_args = Test()

Above is framework class which load information from hundread of files and create member like above

import first_check
class Second(object):
    """Base args"""
    def __init__(self):
        pass

def main():
    base_args = first_check.Test()
    d = base_args.args
    print d


if __name__ == '__main__':
    main()

Above is user class when engineer create object of Test class and access member of Test class

#!/usr/bin/env python
import importlib
import gc

def main():
    lib = importlib.import_module('second_check')
    lib.main()
if __name__ == '__main__':
    main()

This is wrapper program where I am trying to load second_check and run program. if we look into second_check we have used only args member and rest is unused for second_check (parser, sub_parser). we can retrieve information only used member.

parser, sub_parser not used into second_check but it can used into another check. so it is not complete unused parameter. will it possible to get such info and print into third_class.