Llamafile
Llamafile 允许您使用单个文件分发和运行大型语言模型。
Llamafile 通过将 llama.cpp 与 Cosmopolitan Libc 结合到一个框架中来实现这一点，该框架将大型语言模型的所有复杂性压缩到一个可在大多数计算机上本地运行的单文件可执行文件（称为“llamafile”）中，无需安装。
设置
- 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://hugging-face.cn/jartine/TinyLlama-1.1B-Chat-v1.0-GGUF/resolve/main/TinyLlama-1.1B-Chat-v1.0.Q5_K_M.llamafile
- 使 llamafile 可执行。首先，如果您尚未执行此操作，请打开终端。**如果您使用的是 MacOS、Linux 或 BSD，**则需要使用
chmod授予计算机执行此新文件的权限（请参见下文）。**如果您使用的是 Windows，**请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
- 在“服务器模式”下运行 llamafile
./TinyLlama-1.1B-Chat-v1.0.Q5_K_M.llamafile --server --nobrowser
现在您可以调用 llamafile 的 REST API 了。默认情况下，llamafile 服务器在 http://localhost:8080 上侦听。您可以在 此处 找到完整的服务器文档。您可以通过 REST API 直接与 llamafile 交互，但在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 参考：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.
要了解有关 LangChain 表达式语言和 LLM 上可用方法的更多信息，请参阅 LCEL 接口