├── .gitignore
├── README.md
├── api
    └── index.py
├── requirements.txt
└── vercel.json


/.gitignore:
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 1 | .vercel
 2 | *.log
 3 | *.pyc
 4 | __pycache__
 5 | 
 6 | # Environments
 7 | .env
 8 | .venv
 9 | env/
10 | venv/
11 | ENV/
12 | env.bak/
13 | venv.bak/
14 | 


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/README.md:
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 1 | 
 2 | [![Deploy with Vercel](https://vercel.com/button)](https://vercel.com/new/clone?repository-url=https%3A%2F%2Fgithub.com%2Fhomanp%2Fvercel-langchain)
 3 | 
 4 | # LangChain running on Vercel
 5 | 
 6 | A minimal example on how to run LangChain on Vercel using Flask.
 7 | 
 8 | ## Installation
 9 | 
10 | #### 1. Virtualenv
11 | Create and activate `virtualenv`.
12 | 
13 | ```bash
14 | virtualenv MY_ENV
15 | source MY_ENV/bin/activate
16 | ```
17 | 
18 | #### 2. Install requirements
19 | ```bash
20 | pip install requirements.txt
21 | ```
22 | 
23 | #### 3. Start development server
24 | ```bash
25 | vercel dev
26 | ```
27 | 
28 | #### 4. Example API route
29 | ```bash
30 | GET http://localhost:3000
31 | ```
32 | 
33 | ## Environment Variables
34 | 
35 | To run this project, you will need to add the following environment variables to your .env file
36 | 
37 | `OPENAI_API_KEY`
38 | 
39 | ## One-Click Deploy
40 | 
41 | [![Deploy with Vercel](https://vercel.com/button)](https://vercel.com/new/clone?repository-url=https%3A%2F%2Fgithub.com%2Fhomanp%2Fvercel-langchain)
42 | 
43 | 
44 | 
45 | ## Further reading
46 | 
47 | Learn more about how to use LangChain by visiting the offical documentation or repo:
48 | 
49 | https://langchain.readthedocs.io/en/latest/
50 | 
51 | https://github.com/hwchase17/langchain


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/api/index.py:
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 1 | import os
 2 | 
 3 | from flask import Flask
 4 | from langchain.llms import OpenAI
 5 | 
 6 | app = Flask(__name__)
 7 | 
 8 | @app.route('/')
 9 | def home():
10 |     llm = OpenAI(temperature=0.9)
11 |     text = "What would be a good company name a company that makes colorful socks?"
12 | 
13 |     return llm(text)
14 | 


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/requirements.txt:
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1 | Flask==2.2.2
2 | langchain==0.0.113
3 | openai==0.26.4
4 | 


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/vercel.json:
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 1 | {
 2 |   "builds": [
 3 |     {
 4 |       "src": "api/index.py",
 5 |       "use": "@vercel/python"
 6 |     }
 7 |   ],
 8 |   "routes": [
 9 |     {
10 |       "src": "/(.*)",
11 |       "dest": "api/index.py"
12 |     }
13 |   ]
14 | }


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