text: class SubsystemA:
  
  	def method1(self):
  		print('SubsystemA method1 ...')
  		
  	def method2(self):
  		print('SubsystemA method2 ...')
  
  
  class SubsystemB:
  	
  	def method1(self):
  		print('SubsystemB method1 ...')
  		
  	def method2(self):
  		print('SubsystemB method2 ...')
  
  
  class Facade:
  
  	def __init__(self):
  		self._subsystem_A = SubsystemA()
  		self._subsystem_B = SubsystemB()
  
  	def method(self):
  		self._subsystem_A.method1()
  		self._subsystem_A.method2()
  		
  		self._subsystem_B.method1()
  		self._subsystem_B.method2()
  
  
  def main():
  	facade = Facade()
  	facade.method()
  
  
  if __name__ == "__main__":
  	main()
  