无法识别使用Chatterb的dinputFormatException

Question

我在创建Python Chatterbot实例时遇到一个“unrecognedinputformatexception”。我使用的代码基于发布的示例here。代码如下：

from chatterbot import ChatBot


def main():
    from chatterbot.training.trainers import ChatterBotCorpusTrainer
    # create a new instance of a chatbot
    bot = ChatBot("proactive_response1",
              storage_adapter="chatterbot.adapters.storage.JsonDatabaseAdapter",
              logic_adapters=["chatterbot.adapters.logic.ClosestMatchAdapter"],
              input_adapter="chatterbot.adapters.input.VariableInputTypeAdapter",
              output_adapter="chatterbot.adapters.output.OutputFormatAdapter",
              output_format='text',
              database="../database.db"
              )

# set up machine learning training
    bot.set_trainer(ChatterBotCorpusTrainer)
    bot.train("chatterbot.corpus.english.proactive_corpus.proactive_response1")

print('Welcome , I\'m theProActive Response Bot, how are you today?')

while True:
    try:
        bot_input = bot.get_response(None)
        print(bot_input)

    # Press ctrl-c or ctrl-d on the keyboard to exit
    except (KeyboardInterrupt, EOFError, SystemExit):
        break


main()

这是stacktrace：

^{pr2}$

进程结束，退出代码为1