# Version is the base image version from the TLD Makefile
ARG BASE_VERSION=latest
ARG ISTIO_BASE_REGISTRY=gcr.io/istio-release

# The following section is used as base image if BASE_DISTRIBUTION=debug
FROM ${ISTIO_BASE_REGISTRY}/base:${BASE_VERSION} as debug

# The following section is used as base image if BASE_DISTRIBUTION=distroless
# This image is a custom built debian11 distroless image with multiarchitecture support.

              "blocks": [
                {
                  "type": "section",
                  "text": {
                    "type": "mrkdwn",

            {
              "text": "<https://github.com/gradle/gradle/${{ github.event.ref }}|[gradle/gradle#${{ github.event.ref }}]> has been pushed",
              "blocks": [
                {
                  "type": "section",
                  "text": {
                    "type": "mrkdwn",
                    "text": "<https://github.com/gradle/gradle/${{ github.event.ref }}|[gradle/gradle#${{ github.event.ref }}]> has been pushed"

# 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

!!! info
    As this is a WebSocket it doesn't really make sense to raise an `HTTPException`, instead we raise a `WebSocketException`.

    You can use a closing code from the <a href="https://tools.ietf.org/html/rfc6455#section-7.4.1" class="external-link" target="_blank">valid codes defined in the specification</a>.

### Try the WebSockets with dependencies

If your file is named `main.py`, run your application with:

<div class="termy">

### Check the docs

Now you can start your app and go to <a href="http://127.0.0.1:8000/docs" class="external-link" target="_blank">http://127.0.0.1:8000/docs</a>.

You will see your docs including a "Callbacks" section for your *path operation* that shows how the *external API* should look like:

          members_order: source
          separate_signature: true
          unwrap_annotated: true
          filters:
          - '!^_'
          merge_init_into_class: true
          docstring_section_style: spacy
          signature_crossrefs: true
          show_symbol_type_heading: true
          show_symbol_type_toc: true
nav:
- FastAPI: index.md
- features.md
- Learn:
  - learn/index.md