code: def delete(self,*args):
  		
  		if args:
  			args=args[0] if utils.is_list(args[0]) else args
  			path=utils.dict_path(self.__dict__)
  			for _ in args:
  				if _ in self.__dict__.keys():
  					raise Exception('"{0}" cannot be deleted'.format(_))
  
  			for a in args:
  				try:
  					if a in ('shapes'):
  						self.layout[a].clear()
  					elif a=='annotations':
  						self.layout['annotations']={'values':[],'params':{}}
  					else:
  						del reduce(dict.get, path[a],self.__dict__)[a]
  				except:
  					raise Exception('Key: {0} not found'.format(a))
docs: Deletes the values for a QuantFigure
  		The key-values are automatically deleted from the correct 
  		section of the QuantFigure