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https://github.com/jxnl/instructor

structured outputs for llms
https://github.com/jxnl/instructor

openai openai-function-calli openai-functions pydantic-v2 python validation

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structured outputs for llms

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# Instructor: Structured LLM Outputs



Instructor is a Python library that makes it a breeze to work with structured outputs from large language models (LLMs). Built on top of Pydantic, it provides a simple, transparent, and user-friendly API to manage validation, retries, and streaming responses. Get ready to supercharge your LLM workflows!



[![Twitter Follow](https://img.shields.io/twitter/follow/jxnlco?style=social)](https://twitter.com/jxnlco)

[![Discord](https://img.shields.io/discord/1192334452110659664?label=discord)](https://discord.gg/bD9YE9JArw)

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## Want your logo on our website?



If your company use instructor a lot, we'd love to have your logo on our website! Please fill out [this form](https://q7gjsgfstrp.typeform.com/to/wluQlVVQ)



## Key Features



- **Response Models**: Specify Pydantic models to define the structure of your LLM outputs

- **Retry Management**: Easily configure the number of retry attempts for your requests

- **Validation**: Ensure LLM responses conform to your expectations with Pydantic validation

- **Streaming Support**: Work with Lists and Partial responses effortlessly

- **Flexible Backends**: Seamlessly integrate with various LLM providers beyond OpenAI

- **Support in many Languages**: We support many languages including [Python](https://python.useinstructor.com), [TypeScript](https://js.useinstructor.com), [Ruby](https://ruby.useinstructor.com), [Go](https://go.useinstructor.com), and [Elixir](https://hex.pm/packages/instructor)



## Get Started in Minutes



Install Instructor with a single command:



```bash

pip install -U instructor

```



Now, let's see Instructor in action with a simple example:



```python

import instructor

from pydantic import BaseModel

from openai import OpenAI



# Define your desired output structure

class UserInfo(BaseModel):

    name: str

    age: int



# Patch the OpenAI client

client = instructor.from_openai(OpenAI())



# Extract structured data from natural language

user_info = client.chat.completions.create(

    model="gpt-3.5-turbo",

    response_model=UserInfo,

    messages=[{"role": "user", "content": "John Doe is 30 years old."}],

)



print(user_info.name)

#> John Doe

print(user_info.age)

#> 30

```



### Using Anthropic Models



```python

import instructor

from anthropic import Anthropic

from pydantic import BaseModel



class User(BaseModel):

    name: str

    age: int



client = instructor.from_anthropic(Anthropic())



# note that client.chat.completions.create will also work

resp = client.messages.create(

    model="claude-3-opus-20240229",

    max_tokens=1024,

    messages=[

        {

            "role": "user",

            "content": "Extract Jason is 25 years old.",

        }

    ],

    response_model=User,

)



assert isinstance(resp, User)

assert resp.name == "Jason"

assert resp.age == 25

```



### Using Cohere Models



Make sure to install `cohere` and set your system environment variable with `export CO_API_KEY=`.



```

pip install cohere

```



```python

import instructor

import cohere

from pydantic import BaseModel



class User(BaseModel):

    name: str

    age: int



client = instructor.from_cohere(cohere.Client())



# note that client.chat.completions.create will also work

resp = client.chat.completions.create(

    model="command-r-plus",

    max_tokens=1024,

    messages=[

        {

            "role": "user",

            "content": "Extract Jason is 25 years old.",

        }

    ],

    response_model=User,

)



assert isinstance(resp, User)

assert resp.name == "Jason"

assert resp.age == 25

```



### Using Gemini Models



Make sure you [install](https://ai.google.dev/api/python/google/generativeai#setup) the Google AI Python SDK. You should set a `GOOGLE_API_KEY` environment variable with your API key.



```

pip install google-generativeai

```



```python

import instructor

import google.generativeai as genai

from pydantic import BaseModel



class User(BaseModel):

    name: str

    age: int



# genai.configure(api_key=os.environ["API_KEY"]) # alternative API key configuration

client = instructor.from_gemini(

    client=genai.GenerativeModel(

        model_name="models/gemini-1.5-flash-latest",  # model defaults to "gemini-pro"

    ),

    mode=instructor.Mode.GEMINI_JSON,

)

```



### Using Litellm



```python

import instructor

from litellm import completion

from pydantic import BaseModel



class User(BaseModel):

    name: str

    age: int



client = instructor.from_litellm(completion)



resp = client.chat.completions.create(

    model="claude-3-opus-20240229",

    max_tokens=1024,

    messages=[

        {

            "role": "user",

            "content": "Extract Jason is 25 years old.",

        }

    ],

    response_model=User,

)



assert isinstance(resp, User)

assert resp.name == "Jason"

assert resp.age == 25

```



## Types are inferred correctly



This was the dream of instructor but due to the patching of openai, it wasnt possible for me to get typing to work well. Now, with the new client, we can get typing to work well! We've also added a few `create_*` methods to make it easier to create iterables and partials, and to access the original completion.



### Calling `create`



```python

import openai

import instructor

from pydantic import BaseModel



class User(BaseModel):

    name: str

    age: int



client = instructor.from_openai(openai.OpenAI())



user = client.chat.completions.create(

    model="gpt-4-turbo-preview",

    messages=[

        {"role": "user", "content": "Create a user"},

    ],

    response_model=User,

)

```



Now if you use an IDE, you can see the type is correctly inferred.



![type](./docs/blog/posts/img/type.png)



### Handling async: `await create`



This will also work correctly with asynchronous clients.



```python

import openai

import instructor

from pydantic import BaseModel



client = instructor.from_openai(openai.AsyncOpenAI())



class User(BaseModel):

    name: str

    age: int



async def extract():

    return await client.chat.completions.create(

        model="gpt-4-turbo-preview",

        messages=[

            {"role": "user", "content": "Create a user"},

        ],

        response_model=User,

    )

```



Notice that simply because we return the `create` method, the `extract()` function will return the correct user type.



![async](./docs/blog/posts/img/async_type.png)



### Returning the original completion: `create_with_completion`



You can also return the original completion object



```python

import openai

import instructor

from pydantic import BaseModel



client = instructor.from_openai(openai.OpenAI())



class User(BaseModel):

    name: str

    age: int



user, completion = client.chat.completions.create_with_completion(

    model="gpt-4-turbo-preview",

    messages=[

        {"role": "user", "content": "Create a user"},

    ],

    response_model=User,

)

```



![with_completion](./docs/blog/posts/img/with_completion.png)



### Streaming Partial Objects: `create_partial`



In order to handle streams, we still support `Iterable[T]` and `Partial[T]` but to simplify the type inference, we've added `create_iterable` and `create_partial` methods as well!



```python

import openai

import instructor

from pydantic import BaseModel



client = instructor.from_openai(openai.OpenAI())



class User(BaseModel):

    name: str

    age: int



user_stream = client.chat.completions.create_partial(

    model="gpt-4-turbo-preview",

    messages=[

        {"role": "user", "content": "Create a user"},

    ],

    response_model=User,

)



for user in user_stream:

    print(user)

    #> name=None age=None

    #> name=None age=None

    #> name=None age=None

    #> name=None age=None

    #> name=None age=None

    #> name=None age=None

    #> name='John Doe' age=None

    #> name='John Doe' age=None

    #> name='John Doe' age=None

    #> name='John Doe' age=30

    #> name='John Doe' age=30

    # name=None age=None

    # name='' age=None

    # name='John' age=None

    # name='John Doe' age=None

    # name='John Doe' age=30

```



Notice now that the type inferred is `Generator[User, None]`



![generator](./docs/blog/posts/img/generator.png)



### Streaming Iterables: `create_iterable`



We get an iterable of objects when we want to extract multiple objects.



```python

import openai

import instructor

from pydantic import BaseModel



client = instructor.from_openai(openai.OpenAI())



class User(BaseModel):

    name: str

    age: int



users = client.chat.completions.create_iterable(

    model="gpt-4-turbo-preview",

    messages=[

        {"role": "user", "content": "Create 2 users"},

    ],

    response_model=User,

)



for user in users:

    print(user)

    #> name='John Doe' age=30

    #> name='Jane Doe' age=28

    # User(name='John Doe', age=30)

    # User(name='Jane Smith', age=25)

```



![iterable](./docs/blog/posts/img/iterable.png)



## [Evals](https://github.com/jxnl/instructor/tree/main/tests/llm/test_openai/evals#how-to-contribute-writing-and-running-evaluation-tests)



We invite you to contribute to evals in `pytest` as a way to monitor the quality of the OpenAI models and the `instructor` library. To get started check out the evals for [anthropic](https://github.com/jxnl/instructor/blob/main/tests/llm/test_anthropic/evals/test_simple.py) and [OpenAI](https://github.com/jxnl/instructor/tree/main/tests/llm/test_openai/evals#how-to-contribute-writing-and-running-evaluation-tests) and contribute your own evals in the form of pytest tests. These evals will be run once a week and the results will be posted.



## Contributing



If you want to help, checkout some of the issues marked as `good-first-issue` or `help-wanted` found [here](https://github.com/jxnl/instructor/labels/good%20first%20issue). They could be anything from code improvements, a guest blog post, or a new cookbook.



## CLI



We also provide some added CLI functionality for easy convinience:



- `instructor jobs` : This helps with the creation of fine-tuning jobs with OpenAI. Simple use `instructor jobs create-from-file --help` to get started creating your first fine-tuned GPT3.5 model



- `instructor files` : Manage your uploaded files with ease. You'll be able to create, delete and upload files all from the command line



- `instructor usage` : Instead of heading to the OpenAI site each time, you can monitor your usage from the cli and filter by date and time period. Note that usage often takes ~5-10 minutes to update from OpenAI's side



## License



This project is licensed under the terms of the MIT License.



# Contributors