#: c04:ProxyDemo.py
# Simple demonstration of the Proxy pattern.

class Implementation:
  def f(self): 
    print "Implementation.f()"
  def g(self): 
    print "Implementation.g()" 
  def h(self): 
    print "Implementation.h()" 

class Proxy:
  def __init__(self): 
    self.__implementation = Implementation() 
  # Pass method calls to the implementation:
  def f(self): self.__implementation.f() 
  def g(self): self.__implementation.g() 
  def h(self): self.__implementation.h() 

p = Proxy()
p.f(); p.g(); p.h()
#:~