"""
File: funarg3.py

It is possible to return two local functions
simultaneously as a pair. These returned
functions share a closure.

Changes made by the returned function f to 
the nonlocal variable count is seen by
returned function g.
"""

def fgen(w,x):

   def inc_a(y):
      nonlocal count

      count += 1
      print("count=", count)

      return y + a


   def inc_b(y):
      nonlocal count

      count += 1
      print("count=", count)

      return y + b

   a = w
   b = x
   count = 0 
   return (inc_a, inc_b)


(f,g) = fgen(3,17)

print("Calling f():")
print(f(1))
print(f(2))
print(f(3))

print("Calling g():")
print(g(1))
print(g(2))
print(g(3))