Excluding repeated calculating the results of return value from class inside loop

The code repeats calculating the returned lists x, y, z from class (XYZ) for each round inside the (S) class loop, and that is time consuming. How could I get those lists out of the loop? EXPLAINING: to get S you need W and to get W you need to get x, y, z from XYZ (but x, y, z lists are constant value, and no need to recalculate them each round of S) Here is the code:

class XYZ('there is some other classes here'):      def __init__(self):          super().__init__()        def get_x_y_z(self):          x = []          y = []          z = []          ##some input values and used the inherited class##          return x,y,z    class W(XYZ):      def __init__(self):                def get_w(self):          x_y_z = XYZ.get_x_y_z(self)          x = x_y_z[0]          y = x_y_z[1]          z = x_y_z[2]          # w = f(x,y,z)+..., but here is a brief formula          w = x*y*z          return w    class S(W):      def __init__(self):        def get_s(self):          s = []          n=1000          w = W.get_w(self)          for i in range(n):              # s = f(w)+...., but here is a brief formula              v = w+i              s.append(v)          return s  

https://stackoverflow.com/questions/65589251/excluding-repeated-calculating-the-results-of-return-value-from-class-inside-loo January 06, 2021 at 10:10AM