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Llamafile

Llamafile 允许你使用单个文件分发和运行LLMs。

Llamafile 通过将 llama.cpp 与 Cosmopolitan Libc 结合到一个框架中，将 LLM 的所有复杂性简化为一个单文件可执行文件（称为 "llamafile"），该文件可以在大多数计算机上本地运行，无需安装。

设置​

  1. 下载您想要使用的模型的llamafile。您可以在HuggingFace上找到许多llamafile格式的模型。在本指南中，我们将下载一个小型的模型，TinyLlama-1.1B-Chat-v1.0.Q5_K_M。注意：如果您没有wget，您可以通过此链接下载模型。
wget https://huggingface.co/jartine/TinyLlama-1.1B-Chat-v1.0-GGUF/resolve/main/TinyLlama-1.1B-Chat-v1.0.Q5_K_M.llamafile
  1. 使llamafile可执行。首先，如果你还没有这样做，打开一个终端。如果你使用的是MacOS、Linux或BSD，你需要使用chmod授予你的计算机执行这个新文件的权限（见下文）。如果你在Windows上，通过在文件末尾添加“.exe”来重命名文件（模型文件应命名为TinyLlama-1.1B-Chat-v1.0.Q5_K_M.llamafile.exe）。
chmod +x TinyLlama-1.1B-Chat-v1.0.Q5_K_M.llamafile  # run if you're on MacOS, Linux, or BSD
  1. 在“服务器模式”下运行llamafile：
./TinyLlama-1.1B-Chat-v1.0.Q5_K_M.llamafile --server --nobrowser

现在你可以调用llamafile的REST API。默认情况下，llamafile服务器监听在http://localhost:8080。你可以找到完整的服务器文档这里。你可以直接通过REST API与llamafile交互，但这里我们将展示如何使用LangChain与其交互。

用法​

from langchain_community.llms.llamafile import Llamafile

llm = Llamafile()

llm.invoke("Tell me a joke")
API Reference:Llamafile
'? \nI\'ve got a thing for pink, but you know that.\n"Can we not talk about work anymore?" - What did she say?\nI don\'t want to be a burden on you.\nIt\'s hard to keep a good thing going.\nYou can\'t tell me what I want, I have a life too!'

要流式传输令牌，请使用 .stream(...) 方法：

query = "Tell me a joke"

for chunks in llm.stream(query):
    print(chunks, end="")

print()
.
- She said, "I’m tired of my life. What should I do?"
- The man replied, "I hear you. But don’t worry. Life is just like a joke. It has its funny parts too."
- The woman looked at him, amazed and happy to hear his wise words. - "Thank you for your wisdom," she said, smiling. - He replied, "Any time. But it doesn't come easy. You have to laugh and keep moving forward in life."
- She nodded, thanking him again. - The man smiled wryly. "Life can be tough. Sometimes it seems like you’re never going to get out of your situation."
- He said, "I know that. But the key is not giving up. Life has many ups and downs, but in the end, it will turn out okay."
- The woman's eyes softened. "Thank you for your advice. It's so important to keep moving forward in life," she said. - He nodded once again. "You’re welcome. I hope your journey is filled with laughter and joy."
- They both smiled and left the bar, ready to embark on their respective adventures.

要了解更多关于LangChain表达语言和LLM上可用的方法，请参阅LCEL接口

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