def pretty_str(self, indent=0):
        """Return a human-readable string representation of this object.

        Kwargs:
            indent (int): The amount of spaces to use as indentation.
        """
        spaces = ' ' * indent
        return spaces + ', '.join(v.pretty_str() for v in self.variables)
Return a human-readable string representation of this object.

        Kwargs:
            indent (int): The amount of spaces to use as indentation.