本章详细剥析如何搭建「自定义知识库的聊天机器人」。
git clone https://github.com/Airbangs/Operation-management-case-base
pip3 install gpt-index
pip3 install langchain
pip3 install transformers
缺啥补啥
#!/usr/bin/env python3
from gpt_index import SimpleDirectoryReader, GPTListIndex, readers, GPTSimpleVectorIndex, LLMPredictor, PromptHelper,ServiceContext
from langchain import OpenAI
import sys
import os
from IPython.display import Markdown, display
import PyPDF2
# 设置 OpenAI API Key
os.environ["OPENAI_API_KEY"] = "你的Open_Api_Key"
def main():
# set maximum input size
max_input_size = 4096
# set number of output tokens
num_outputs = 4000
# set maximum chunk overlap
max_chunk_overlap = 20
# set chunk size limit
chunk_size_limit = 600
# define LLM
llm_predictor = LLMPredictor(llm=OpenAI(temperature=0.5, model_name="text-davinci-003", max_tokens=num_outputs))
prompt_helper = PromptHelper(max_input_size, num_outputs, max_chunk_overlap, chunk_size_limit=chunk_size_limit)
documents = SimpleDirectoryReader('你的文件目录/files').load_data()
service_context = ServiceContext.from_defaults(llm_predictor=llm_predictor, prompt_helper=prompt_helper)
index = GPTSimpleVectorIndex.from_documents(
documents, service_context=service_context
)
index.save_to_disk('index.json')
index = GPTSimpleVectorIndex.load_from_disk('index.json')
while True:
query = input("小朋友你是不是有很多问号,提出来让我帮你吧:")
response = index.query(query, response_mode="compact")
print(f"Response: {response.response}")
if __name__ == '__main__':
main()
[Tips] 若使用付费的GPT4则更佳
ModuleNotFoundError: No module named 'langchain.utilities'
报错可能原因:python版本低于3.8
解决:升级到3.8+(我使用的是3.9.4)
页面更新:2024-03-04
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