vellum-ai 0.9.0

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Vellum Python Library

The Vellum Python SDK provides access to the Vellum API from python.

API Docs

You can find Vellum's complete API docs at docs.vellum.ai.

Installation

pip install --upgrade vellum-ai

Usage

Below is how you would invoke a deployed Prompt from the Vellum API. For a complete list of all APIs that Vellum supports, check out our API Reference.

from vellum import (
    StringInputRequest,
)
from vellum.client import Vellum

client = Vellum(
    api_key="YOUR_API_KEY",
)

def execute() -> str:
    result = client.execute_prompt(
        prompt_deployment_name="<example-deployment-name>>",
        release_tag="LATEST",
        inputs=[
            StringInputRequest(
                name="input_a",
                type="STRING",
                value="Hello, world!",
            )
        ],
    )
    
    if result.state == "REJECTED":
        raise Exception(result.error.message)

    return result.outputs[0].value

if __name__ == "__main__":
    print(execute())

[!TIP] You can set a system environment variable VELLUM_API_KEY to avoid writing your api key within your code. To do so, add export VELLUM_API_KEY=<your-api-token> to your ~/.zshrc or ~/.bashrc, open a new terminal, and then any code calling vellum.Vellum() will read this key.

Async Client

This SDK has an async version. Here's how to use it:

import asyncio

import vellum
from vellum.client import AsyncVellum

client = AsyncVellum(api_key="YOUR_API_KEY")

async def execute() -> str:
    result = await client.execute_prompt(
        prompt_deployment_name="<example-deployment-name>>",
        release_tag="LATEST",
        inputs=[
            vellum.StringInputRequest(
                name="input_a",
                value="Hello, world!",
            )
        ],
    )

    if result.state == "REJECTED":
        raise Exception(result.error.message)
    
    return result.outputs[0].value

if __name__ == "__main__":
    print(asyncio.run(execute()))

Contributing

While we value open-source contributions to this SDK, most of this library is generated programmatically.

Please feel free to make contributions to any of the directories or files below:

examples/*
src/vellum/lib/*
tests/*
README.md

Any additions made to files beyond those directories and files above would have to be moved over to our generation code (found in the separate vellum-client-generator repo), otherwise they would be overwritten upon the next generated release. Feel free to open a PR as a proof of concept, but know that we will not be able to merge it as-is. We suggest opening an issue first to discuss with us!