text: from __future__ import print_function
  
  import fibra
  
  def a(tube):
      print('Pushing "a" into tube.')
      yield tube.push('a')
      print("Push is completed.")
      yield 5
      yield tube.push('b')
  
  def b(tube):
      print('Blocking for 1 second.' )
      yield 1
      x = yield tube.pop()
      print('Received "%s" from tube.'%x)
      print("Waiting for pop...")
      x = yield tube.pop()
      print('Received "%s" from tube.'%x)
  
  
  def main():
      t = fibra.Tube()
      schedule = fibra.schedule()
      schedule.install(a(t))
      schedule.install(b(t))
      schedule.run()
  
  if __name__ == '__main__':
      main()
      
  