def add_theme(self, other):
        if other.complete:
            return other
        else:
            theme_copy = deepcopy(self)
            theme_copy.element_themes = merge_element_targets(
                deepcopy(self.element_themes),
                deepcopy(other.element_themes))
            return theme_copy
Add themes together.
dataset/ETHPy150Open yhat/ggplot/ggplot/themes/theme.py/theme.add_theme