如LangChain 快速入门所示，我正在尝试以下 Python 代码：
from langchain.prompts.chat import ChatPromptTemplate
template = "You are a helpful assistant that translates {input_language} to {output_language}."
human_template = "{text}"
chat_prompt = ChatPromptTemplate.from_messages([
("system", template),
("human", human_template),
])
chat_prompt.format_messages(input_language="English", output_language="French", text="I love programming.")
但是当我运行上面的代码时，出现以下错误：
Traceback (most recent call last):
File "/home/yser364/Projets/SinappsIrdOpenaiQA/promptWorkout.py", line 6, in <module>
chat_prompt = ChatPromptTemplate.from_messages([
File "/home/yser364/.local/lib/python3.10/site-packages/langchain/prompts/chat.py", line 220, in from_messages
return cls(input_variables=list(input_vars), messages=messages)
File "/home/yser364/.local/lib/python3.10/site-packages/langchain/load/serializable.py", line 64, in __init__
super().__init__(**kwargs)
File "pydantic/main.py", line 341, in pydantic.main.BaseModel.__init__
pydantic.error_wrappers.ValidationError: 4 validation errors for ChatPromptTemplate …