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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def multiple_directory_files_loader(*args):
 """ Loads all the files in each directory as values in a dict with the key being the relative file path of the directory. Updates the value if subsequent file paths are the same. """

    d = dict()

    def load_files(folder):
        for (dirpath, dirnames, filenames) in os.walk(folder):
            for f in filenames:
                filepath = os.path.join(dirpath, f)
                with open( filepath, 'r' ) as f:
                    key = filepath[len(os.path.commonprefix([root, filepath]))+1:]
                    d[ key ] = f.read()
            for foldername in dirnames:
                load_files(os.path.join(dirpath, foldername))

    for root in args:
        load_files(root)
    return d