You could also use it to generate code automatically, for clients that communicate with your API. For example, frontend, mobile or IoT applications.

## Recap, step by step

### Step 1: import `FastAPI`

```Python hl_lines="1"
{!../../../docs_src/first_steps/tutorial001.py!}
```

`FastAPI` is a Python class that provides all the functionality for your API.

# Tutorial - User Guide

This tutorial shows you how to use **FastAPI** with most of its features, step by step.

Each section gradually builds on the previous ones, but it's structured to separate topics, so that you can go directly to any specific one to solve your specific API needs.

It is also built to work as a future reference.

So you can come back and see exactly what you need.

## Run the code

    The `--upgrade` option tells `pip` to upgrade the packages if they are already installed.

    Because the previous step copying the file could be detected by the **Docker cache**, this step will also **use the Docker cache** when available.

* 🌐 Remove Vietnamese note about missing translation. PR [#9957](https://github.com/tiangolo/fastapi/pull/9957) by [@tiangolo](https://github.com/tiangolo).

### Internal

* 👷 Add GitHub Actions step dump context to debug external failures. PR [#10008](https://github.com/tiangolo/fastapi/pull/10008) by [@tiangolo](https://github.com/tiangolo).