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.
        """
        if self.parenthesis:
            return '{}({})'.format(' ' * indent, pretty_str(self.value))
        return pretty_str(self.value, indent=indent)
Return a human-readable string representation of this object.

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