@staticmethod
def string_modifier(obj, newline=' '):
    """A string function modifier for the use of __str__.

        Args:
            obj (dict): A list of dict(s).
            newline (str): A newline char. default ' '.

        Returns:
            A string with chosen newline char.
        """
    data = ''
    for elm in obj:
        for key, value in elm.items():
            data += key + ' = ' + value + newline
    return data
