"""
File: funarg1.py

A function can return a local function
as a return value.

fgen() below "makes" functions.
The returned functions retain their
own copies of nonlocal variable a
"""

def fgen(x):

   def inc_a(y):
      nonlocal a
      return y + a

   a = x
   return inc_a


add3 = fgen(3)
add7 = fgen(7)

print( "add3(1) = " + str(add3(1)) )
print( "add7(1) = " + str(add7(1)) )
print( "add3(2) = " + str(add3(2)) )
print( "add7(2) = " + str(add7(2)) )
print( "add3(3) = " + str(add3(3)) )
print( "add7(3) = " + str(add7(3)) )