Python---higher-order functions as parameters

With the function as a parameter in section 2.1, we talk about the concept of higher-order functions and write a simple high-order function: def Add (x, Y, f):     return f (x) + f (Y) if incoming ABS is the value of the parameter F: Add (-5, 9, ABS) according to the definition of the function, the code that the function executes is actually: ABS (-5) + ABS (9) Because parameter x, Y, and F can all be passed in arbitrarily, if f passes into other functions, it can get different return values. The task takes advantage of the Add (x,y,f) function, which calculates:import  mathdef  Add (x,    y, f):return f (x) + f (y)print Add (9, MATH.SQRT)

Python---higher-order functions as parameters