How make higher order function Python django

  How make higher order function in Python django 
 
 You have two choices: you can use nested scopes or you can use callable  objects.
For example, suppose you wanted to define linear(a,b) which  returns a function f(x)
that computes the value a*x+b. Using nested  scopes:

def linear(a,b):
 def result(x):
            return a*x + b
   return result

Or using a callable object:

class linear:
    def __init__(self, a, b):
           self.a, self.b = a,b
    def __call__(self, x):
          return self.a * x + self.b

In both cases:

taxes = linear(0.3,2)

gives a callable object where taxes(10e6) == 0.3 * 10e6 + 2.

The callable object approach has the disadvantage that it is a bit  slower and results
in slightly longer code. However, note that a  collection of callables can share their
signature via inheritance:

class exponential(linear):
     # __init__ inherited
     def __call__(self, x):
            return self.a * (x ** self.b)

Object can encapsulate state for several methods:

class counter:
      value = 0
      def set(self, x): self.value = x
      def up(self): self.value=self.value+1
      def down(self): self.value=self.value-1

count = counter()
inc, dec, reset = count.up, count.down, count.set


Here up(), down() and set() act like functions which share the same counting variable.