Metadata-Version: 2.1 Name: fastapi Version: 0.112.0 Summary: FastAPI framework, high performance, easy to learn, fast to code, ready for production Author-Email: =?utf-8?q?Sebasti=C3=A1n_Ram=C3=ADrez?= Classifier: Intended Audience :: Information Technology Classifier: Intended Audience :: System Administrators Classifier: Operating System :: OS Independent Classifier: Programming Language :: Python :: 3 Classifier: Programming Language :: Python Classifier: Topic :: Internet Classifier: Topic :: Software Development :: Libraries :: Application Frameworks Classifier: Topic :: Software Development :: Libraries :: Python Modules Classifier: Topic :: Software Development :: Libraries Classifier: Topic :: Software Development Classifier: Typing :: Typed Classifier: Development Status :: 4 - Beta Classifier: Environment :: Web Environment Classifier: Framework :: AsyncIO Classifier: Framework :: FastAPI Classifier: Framework :: Pydantic Classifier: Framework :: Pydantic :: 1 Classifier: Intended Audience :: Developers Classifier: License :: OSI Approved :: MIT License Classifier: Programming Language :: Python :: 3 :: Only Classifier: Programming Language :: Python :: 3.8 Classifier: Programming Language :: Python :: 3.9 Classifier: Programming Language :: Python :: 3.10 Classifier: Programming Language :: Python :: 3.11 Classifier: Programming Language :: Python :: 3.12 Classifier: Topic :: Internet :: WWW/HTTP :: HTTP Servers Classifier: Topic :: Internet :: WWW/HTTP Project-URL: Homepage, https://github.com/fastapi/fastapi Project-URL: Documentation, https://fastapi.tiangolo.com/ Project-URL: Repository, https://github.com/fastapi/fastapi Requires-Python: >=3.8 Requires-Dist: starlette<0.38.0,>=0.37.2 Requires-Dist: pydantic!=1.8,!=1.8.1,!=2.0.0,!=2.0.1,!=2.1.0,<3.0.0,>=1.7.4 Requires-Dist: typing-extensions>=4.8.0 Requires-Dist: fastapi-cli[standard]>=0.0.5; extra == "standard" Requires-Dist: httpx>=0.23.0; extra == "standard" Requires-Dist: jinja2>=2.11.2; extra == "standard" Requires-Dist: python-multipart>=0.0.7; extra == "standard" Requires-Dist: email_validator>=2.0.0; extra == "standard" Requires-Dist: uvicorn[standard]>=0.12.0; extra == "standard" Requires-Dist: fastapi-cli[standard]>=0.0.5; extra == "all" Requires-Dist: httpx>=0.23.0; extra == "all" Requires-Dist: jinja2>=2.11.2; extra == "all" Requires-Dist: python-multipart>=0.0.7; extra == "all" Requires-Dist: itsdangerous>=1.1.0; extra == "all" Requires-Dist: pyyaml>=5.3.1; extra == "all" Requires-Dist: ujson!=4.0.2,!=4.1.0,!=4.2.0,!=4.3.0,!=5.0.0,!=5.1.0,>=4.0.1; extra == "all" Requires-Dist: orjson>=3.2.1; extra == "all" Requires-Dist: email_validator>=2.0.0; extra == "all" Requires-Dist: uvicorn[standard]>=0.12.0; extra == "all" Requires-Dist: pydantic-settings>=2.0.0; extra == "all" Requires-Dist: pydantic-extra-types>=2.0.0; extra == "all" Provides-Extra: standard Provides-Extra: all Description-Content-Type: text/markdown

FastAPI framework, high performance, easy to learn, fast to code, ready for production

--- **Documentation**: https://fastapi.tiangolo.com **Source Code**: https://github.com/fastapi/fastapi --- FastAPI is a modern, fast (high-performance), web framework for building APIs with Python based on standard Python type hints. The key features are: * **Fast**: Very high performance, on par with **NodeJS** and **Go** (thanks to Starlette and Pydantic). [One of the fastest Python frameworks available](#performance). * **Fast to code**: Increase the speed to develop features by about 200% to 300%. * * **Fewer bugs**: Reduce about 40% of human (developer) induced errors. * * **Intuitive**: Great editor support. Completion everywhere. Less time debugging. * **Easy**: Designed to be easy to use and learn. Less time reading docs. * **Short**: Minimize code duplication. Multiple features from each parameter declaration. Fewer bugs. * **Robust**: Get production-ready code. With automatic interactive documentation. * **Standards-based**: Based on (and fully compatible with) the open standards for APIs: OpenAPI (previously known as Swagger) and JSON Schema. * estimation based on tests on an internal development team, building production applications. ## Sponsors

Other sponsors ## Opinions "_[...] I'm using **FastAPI** a ton these days. [...] I'm actually planning to use it for all of my team's **ML services at Microsoft**. Some of them are getting integrated into the core **Windows** product and some **Office** products._"

Kabir Khan - Microsoft (ref)

--- "_We adopted the **FastAPI** library to spawn a **REST** server that can be queried to obtain **predictions**. [for Ludwig]_"

Piero Molino, Yaroslav Dudin, and Sai Sumanth Miryala - Uber (ref)

--- "_**Netflix** is pleased to announce the open-source release of our **crisis management** orchestration framework: **Dispatch**! [built with **FastAPI**]_"

Kevin Glisson, Marc Vilanova, Forest Monsen - Netflix (ref)

--- "_I’m over the moon excited about **FastAPI**. It’s so fun!_"

Brian Okken - Python Bytes podcast host (ref)

--- "_Honestly, what you've built looks super solid and polished. In many ways, it's what I wanted **Hug** to be - it's really inspiring to see someone build that._"

Timothy Crosley - Hug creator (ref)

--- "_If you're looking to learn one **modern framework** for building REST APIs, check out **FastAPI** [...] It's fast, easy to use and easy to learn [...]_" "_We've switched over to **FastAPI** for our **APIs** [...] I think you'll like it [...]_"

Ines Montani - Matthew Honnibal - Explosion AI founders - spaCy creators (ref) - (ref)

--- "_If anyone is looking to build a production Python API, I would highly recommend **FastAPI**. It is **beautifully designed**, **simple to use** and **highly scalable**, it has become a **key component** in our API first development strategy and is driving many automations and services such as our Virtual TAC Engineer._"

Deon Pillsbury - Cisco (ref)

--- ## **Typer**, the FastAPI of CLIs

If you are building a CLI app to be used in the terminal instead of a web API, check out **Typer**. **Typer** is FastAPI's little sibling. And it's intended to be the **FastAPI of CLIs**. ⌨️ 🚀 ## Requirements FastAPI stands on the shoulders of giants: * Starlette for the web parts. * Pydantic for the data parts. ## Installation

```console $ pip install "fastapi[standard]" ---> 100% ```

**Note**: Make sure you put `"fastapi[standard]"` in quotes to ensure it works in all terminals. ## Example ### Create it * Create a file `main.py` with: ```Python from typing import Union from fastapi import FastAPI app = FastAPI() @app.get("/") def read_root(): return {"Hello": "World"} @app.get("/items/{item_id}") def read_item(item_id: int, q: Union[str, None] = None): return {"item_id": item_id, "q": q} ```

Or use async def...

If your code uses `async` / `await`, use `async def`: ```Python hl_lines="9 14" from typing import Union from fastapi import FastAPI app = FastAPI() @app.get("/") async def read_root(): return {"Hello": "World"} @app.get("/items/{item_id}") async def read_item(item_id: int, q: Union[str, None] = None): return {"item_id": item_id, "q": q} ``` **Note**: If you don't know, check the _"In a hurry?"_ section about `async` and `await` in the docs.

### Run it Run the server with:

```console $ fastapi dev main.py ╭────────── FastAPI CLI - Development mode ───────────╮ │ │ │ Serving at: http://127.0.0.1:8000 │ │ │ │ API docs: http://127.0.0.1:8000/docs │ │ │ │ Running in development mode, for production use: │ │ │ │ fastapi run │ │ │ ╰─────────────────────────────────────────────────────╯ INFO: Will watch for changes in these directories: ['/home/user/code/awesomeapp'] INFO: Uvicorn running on http://127.0.0.1:8000 (Press CTRL+C to quit) INFO: Started reloader process [2248755] using WatchFiles INFO: Started server process [2248757] INFO: Waiting for application startup. INFO: Application startup complete. ```

About the command fastapi dev main.py...

The command `fastapi dev` reads your `main.py` file, detects the **FastAPI** app in it, and starts a server using Uvicorn. By default, `fastapi dev` will start with auto-reload enabled for local development. You can read more about it in the FastAPI CLI docs.

### Check it Open your browser at http://127.0.0.1:8000/items/5?q=somequery. You will see the JSON response as: ```JSON {"item_id": 5, "q": "somequery"} ``` You already created an API that: * Receives HTTP requests in the _paths_ `/` and `/items/{item_id}`. * Both _paths_ take `GET` operations (also known as HTTP _methods_). * The _path_ `/items/{item_id}` has a _path parameter_ `item_id` that should be an `int`. * The _path_ `/items/{item_id}` has an optional `str` _query parameter_ `q`. ### Interactive API docs Now go to http://127.0.0.1:8000/docs. You will see the automatic interactive API documentation (provided by Swagger UI): ![Swagger UI](https://fastapi.tiangolo.com/img/index/index-01-swagger-ui-simple.png) ### Alternative API docs And now, go to http://127.0.0.1:8000/redoc. You will see the alternative automatic documentation (provided by ReDoc): ![ReDoc](https://fastapi.tiangolo.com/img/index/index-02-redoc-simple.png) ## Example upgrade Now modify the file `main.py` to receive a body from a `PUT` request. Declare the body using standard Python types, thanks to Pydantic. ```Python hl_lines="4 9-12 25-27" from typing import Union from fastapi import FastAPI from pydantic import BaseModel app = FastAPI() class Item(BaseModel): name: str price: float is_offer: Union[bool, None] = None @app.get("/") def read_root(): return {"Hello": "World"} @app.get("/items/{item_id}") def read_item(item_id: int, q: Union[str, None] = None): return {"item_id": item_id, "q": q} @app.put("/items/{item_id}") def update_item(item_id: int, item: Item): return {"item_name": item.name, "item_id": item_id} ``` The `fastapi dev` server should reload automatically. ### Interactive API docs upgrade Now go to http://127.0.0.1:8000/docs. * The interactive API documentation will be automatically updated, including the new body: ![Swagger UI](https://fastapi.tiangolo.com/img/index/index-03-swagger-02.png) * Click on the button "Try it out", it allows you to fill the parameters and directly interact with the API: ![Swagger UI interaction](https://fastapi.tiangolo.com/img/index/index-04-swagger-03.png) * Then click on the "Execute" button, the user interface will communicate with your API, send the parameters, get the results and show them on the screen: ![Swagger UI interaction](https://fastapi.tiangolo.com/img/index/index-05-swagger-04.png) ### Alternative API docs upgrade And now, go to http://127.0.0.1:8000/redoc. * The alternative documentation will also reflect the new query parameter and body: ![ReDoc](https://fastapi.tiangolo.com/img/index/index-06-redoc-02.png) ### Recap In summary, you declare **once** the types of parameters, body, etc. as function parameters. You do that with standard modern Python types. You don't have to learn a new syntax, the methods or classes of a specific library, etc. Just standard **Python**. For example, for an `int`: ```Python item_id: int ``` or for a more complex `Item` model: ```Python item: Item ``` ...and with that single declaration you get: * Editor support, including: * Completion. * Type checks. * Validation of data: * Automatic and clear errors when the data is invalid. * Validation even for deeply nested JSON objects. * Conversion of input data: coming from the network to Python data and types. Reading from: * JSON. * Path parameters. * Query parameters. * Cookies. * Headers. * Forms. * Files. * Conversion of output data: converting from Python data and types to network data (as JSON): * Convert Python types (`str`, `int`, `float`, `bool`, `list`, etc). * `datetime` objects. * `UUID` objects. * Database models. * ...and many more. * Automatic interactive API documentation, including 2 alternative user interfaces: * Swagger UI. * ReDoc. --- Coming back to the previous code example, **FastAPI** will: * Validate that there is an `item_id` in the path for `GET` and `PUT` requests. * Validate that the `item_id` is of type `int` for `GET` and `PUT` requests. * If it is not, the client will see a useful, clear error. * Check if there is an optional query parameter named `q` (as in `http://127.0.0.1:8000/items/foo?q=somequery`) for `GET` requests. * As the `q` parameter is declared with `= None`, it is optional. * Without the `None` it would be required (as is the body in the case with `PUT`). * For `PUT` requests to `/items/{item_id}`, Read the body as JSON: * Check that it has a required attribute `name` that should be a `str`. * Check that it has a required attribute `price` that has to be a `float`. * Check that it has an optional attribute `is_offer`, that should be a `bool`, if present. * All this would also work for deeply nested JSON objects. * Convert from and to JSON automatically. * Document everything with OpenAPI, that can be used by: * Interactive documentation systems. * Automatic client code generation systems, for many languages. * Provide 2 interactive documentation web interfaces directly. --- We just scratched the surface, but you already get the idea of how it all works. Try changing the line with: ```Python return {"item_name": item.name, "item_id": item_id} ``` ...from: ```Python ... "item_name": item.name ... ``` ...to: ```Python ... "item_price": item.price ... ``` ...and see how your editor will auto-complete the attributes and know their types: ![editor support](https://fastapi.tiangolo.com/img/vscode-completion.png) For a more complete example including more features, see the Tutorial - User Guide. **Spoiler alert**: the tutorial - user guide includes: * Declaration of **parameters** from other different places as: **headers**, **cookies**, **form fields** and **files**. * How to set **validation constraints** as `maximum_length` or `regex`. * A very powerful and easy to use **Dependency Injection** system. * Security and authentication, including support for **OAuth2** with **JWT tokens** and **HTTP Basic** auth. * More advanced (but equally easy) techniques for declaring **deeply nested JSON models** (thanks to Pydantic). * **GraphQL** integration with Strawberry and other libraries. * Many extra features (thanks to Starlette) as: * **WebSockets** * extremely easy tests based on HTTPX and `pytest` * **CORS** * **Cookie Sessions** * ...and more. ## Performance Independent TechEmpower benchmarks show **FastAPI** applications running under Uvicorn as one of the fastest Python frameworks available, only below Starlette and Uvicorn themselves (used internally by FastAPI). (*) To understand more about it, see the section Benchmarks. ## Dependencies FastAPI depends on Pydantic and Starlette. ### `standard` Dependencies When you install FastAPI with `pip install "fastapi[standard]"` it comes the `standard` group of optional dependencies: Used by Pydantic: * email_validator - for email validation. Used by Starlette: * httpx - Required if you want to use the `TestClient`. * jinja2 - Required if you want to use the default template configuration. * python-multipart - Required if you want to support form "parsing", with `request.form()`. Used by FastAPI / Starlette: * uvicorn - for the server that loads and serves your application. This includes `uvicorn[standard]`, which includes some dependencies (e.g. `uvloop`) needed for high performance serving. * `fastapi-cli` - to provide the `fastapi` command. ### Without `standard` Dependencies If you don't want to include the `standard` optional dependencies, you can install with `pip install fastapi` instead of `pip install "fastapi[standard]"`. ### Additional Optional Dependencies There are some additional dependencies you might want to install. Additional optional Pydantic dependencies: * pydantic-settings - for settings management. * pydantic-extra-types - for extra types to be used with Pydantic. Additional optional FastAPI dependencies: * orjson - Required if you want to use `ORJSONResponse`. * ujson - Required if you want to use `UJSONResponse`. ## License This project is licensed under the terms of the MIT license.