pytransitions - 如何编写正确的转换？

Question

我有一个bot代码需要连接到状态机，如何正确实现，请帮帮我，理论上我明白怎么做，但在实践中，它不起作用

状态.py

from transitions import Machine, State
from main import *


states = ['START',
          'WAITING_YES',
          'CHOOSE SIZE',
          'GO PAY'
          'CHOOSE PAY METHOD',
          'REPEATING ORDER',
          'FINISH']

machine = Machine(states=states, initial='START')
machine.add_transition('melt', source='START', dest='WAITING_YES')
if start:
    print('-------------------',machine.state,'-------------------')
    machine.add_ordered_transitions()


if waiting_yes:
    machine.to_WAITING_YES()
    print('-------------------',machine.state,'-------------------')
    machine.next_state()

elif choose_size:
    print('-------------------',machine.state,'-------------------')
    machine.next_state()

elif choose_pay_method:
    print('-------------------',machine.state,'-------------------')
    machine.next_state()


elif repeating_order:
    print('-------------------',machine.state,'-------------------')
    machine.next_state()

elif finish:
    print('-------------------',machine.state,'-------------------')

（理论上，如果有人使用机器人，代码应该显示状态，但后来我想删除它）

完整代码