import py_trees as ptree
from typing import Any
from robowaiter.behavior_lib._base.Cond import Cond

class At(Cond):
    can_be_expanded = True
    num_params = 2
    valid_params = '''
        Coffee, Table
    '''

    def __init__(self,*args):
        super().__init__(*args)



    def _update(self) -> ptree.common.Status:
        # if self.scene.status?
        if self.scene.state['chat_list'] == []:
            return ptree.common.Status.FAILURE
        else:
            return ptree.common.Status.SUCCESS