Ошибка Langgraph: Invalidupdateerror (langgraph.errors.invalidupdateerror: должен написать хотя бы одно из ['' сообщений ⇐ Python

[Anonymous]

Я использую Langgraph 0.2.0 и получаю ошибку, описанную ниже после того, как я вызову функцию infoke (). Как написать сообщения, чтобы избежать ошибок? < /P>
class State(TypedDict):
messages: Annotated[list, add_messages]

graph = StateGraph(State)

File "/home/ubuntu/smit/chatgpt/smitlanggraph.py", line 161, in
result=workflow.invoke(get_user_input({'messages':''}))
File "/home/ubuntu/v2_env_3.9/lib/python3.9/site-packages/langgraph/pregel/__init__.py", line 1299, in invoke
for chunk in self.stream(
File "/home/ubuntu/v2_env_3.9/lib/python3.9/site-packages/langgraph/pregel/__init__.py", line 984, in stream
_panic_or_proceed(done, inflight, loop.step)
File "/home/ubuntu/v2_env_3.9/lib/python3.9/site-packages/langgraph/pregel/__init__.py", line 1385, in _panic_or_proceed
raise exc
File "/home/ubuntu/v2_env_3.9/lib/python3.9/site-packages/langgraph/pregel/executor.py", line 60, in done
task.result()
File "/usr/lib/python3.9/concurrent/futures/_base.py", line 439, in result
return self.__get_result()
File "/usr/lib/python3.9/concurrent/futures/_base.py", line 391, in __get_result
raise self._exception
File "/usr/lib/python3.9/concurrent/futures/thread.py", line 58, in run
result = self.fn(*self.args, **self.kwargs)
File "/home/ubuntu/v2_env_3.9/lib/python3.9/site-packages/langgraph/pregel/retry.py", line 25, in run_with_retry
task.proc.invoke(task.input, task.config)
File "/home/ubuntu/v2_env_3.9/lib/python3.9/site-packages/langgraph/utils.py", line 93, in invoke
ret = self._call_with_config(
File "/home/ubuntu/v2_env_3.9/lib/python3.9/site-packages/langchain_core/runnables/base.py", line 1914, in _call_with_config
context.run(
File "/home/ubuntu/v2_env_3.9/lib/python3.9/site-packages/langchain_core/runnables/config.py", line 396, in call_func_with_variable_args
return func(input, **kwargs) # type: ignore[call-arg]
File "/home/ubuntu/v2_env_3.9/lib/python3.9/site-packages/langgraph/pregel/write.py", line 107, in _write
self.do_write(
File "/home/ubuntu/v2_env_3.9/lib/python3.9/site-packages/langgraph/pregel/write.py", line 157, in do_write
raise InvalidUpdateError(
langgraph.errors.InvalidUpdateError: Must write to at least one of ['messages']


Подробнее здесь: https://stackoverflow.com/questions/794 ... ror-must-w