new_contents: #!/usr/bin/env python
  # encoding=utf8
  
  from flexbe_core import EventState, Logger
  import json
  
  
  class Wonderland_Objects_In_A_Room(EventState):
  	'''
  	Return all objects in a room
  	
  	># json_text        string  json to read
  	
  	#> names            int[]   array containing all names of objects in the room
  	#> ids              id[]    array containing all IDs of objects in the room
  	
  	<= done             return when the room contain at least one object
  	<= empty            return when the room is empty
  	<= error            return when error reading data
  	'''
  	
  	def __init__(self):
  		# See example_state.py for basic explanations.
  		super(Wonderland_Objects_In_A_Room, self).__init__(outcomes=['done', 'empty', 'error'],
  		                                             input_keys=['json_text'],
  		                                             output_keys=['ids', 'names'])
  	
  	def execute(self, userdata):
  		# parse parameter json data
  		datas = json.loads(userdata.json_text)
  		
  		# read if there is data
  		if not datas:
  			# continue to Zero
  			return 'empty'
  		
  		names = []
  		ids = []
  		
  		for data in datas:
  			# try to read data
  			if 'id' not in data:
  				return 'error'
  			
  			# try to read data
  			if 'name' not in data:
  				return 'error'
  			
  			# write return datas
  			names += [data['name']]
  			ids += [data['id']]
  		
  		userdata.names=names
  		userdata.ids=ids
  		print str(names)[1:-1]
  		print str(ids)[1:-1]
  		
  		# continue to Done
  		return 'done'
subject: Add a state listing all entities in a room