def f(state_tax, city_tax, income): return (state_tax + city_tax) * income def f1(state_tax=0.15): def f2(city_tax=0.1): def f3(income): return f(state_tax, city_tax, income) return f3 return f2 print(f1()()(100) ) print(f1(0.2)(0.2)(100))