code: def put(self, item):
          '''
          Add an item to the queue.
          '''
          if self.isfini:
              return False
  
          self.fifo.append(item)
  
          if len(self.fifo) == 1:
              self.event.set()
  
          return Truf put(self, item):
          '''
          Add an item to the queue.
          '''
          if self.isfini:
              return False
  
          self.fifo.append(item)
  
          if len(self.fifo) == 1:
              self.event.set()
  
          return True
docs: Add an item to the queue.