GoF design pattern - Proxy

proxy.py

# -*- coding: utf-8 -*-

import time

class SalesManager:
	def work(self):
		print("Sales Manager working...")

	def talk(self):
		print("Sales Manager ready to talk")


class Proxy:
	def __init__(self):
		self.busy = 'No'
		self.sales = None

	def work(self):
		print("Proxy checking for Sales Manager availability")
		if self.busy == 'No'
			self.sales = SalesManager()
			time.sleep(2)
			self.sales.talk()
		else:
			time.sleep(2)
			print("Sales Manager is busy")


if __name__ == '__main__':
	p = Proxy()
	p.work()
	p.busy = 'Yes'
	p.work()