preparation

       file_data = para.text.read()

       # 添加下载按钮
       st.download_button(
            label="Download optimized file",
            data=file_data,
            file_name="example.txt",
            mime="text/plain"
        )
'''

# Initialize the language models and chains
llm = OpenAI(temperature=0.7, max_tokens=2500)
chain1 = LLMChain(llm=llm, prompt=prompt1)
chain4 = LLMChain(llm=llm, prompt=prompt4)
sequential_chain = SimpleSequentialChain(chains=[chain1, chain4])

# Add a button for the user to click after uploading a file
process_file_button = st.button("开始处理文件")
new_document = docx.Document()
if process_file_button:
    for i in range(len(texts)):
        st.write(texts[0])
        response2 = sequential_chain.run(texts[0])
        st.write(response2)
        new_document.add_paragraph(response2)

    with io.BytesIO() as output:
        new_document.save(output)
        output.seek(0)
        st.download_button("下载处理后的 Word 文件", output, "processed.docx")

        # Add a button for the user to restart the app
    restart_button = st.button("重新开始")
    if restart_button:
        raise st.script_runner.StopException