The next sections are **not necessarily "advanced"**.

And it's possible that for your use case, the solution is in one of them.

///

## Read the Tutorial first { #read-the-tutorial-first }

You could still use most of the features in **FastAPI** with the knowledge from the main [Tutorial - User Guide](../tutorial/index.md){.internal-link target=_blank}.

# FastAPI CLI

**FastAPI CLI** là một chương trình dòng lệnh có thể được sử dụng để phục vụ ứng dụng FastAPI của bạn, quản lý dự án FastAPI của bạn và nhiều hoạt động khác.

Khi bạn cài đặt FastAPI (vd với `pip install "fastapi[standard]"`), nó sẽ bao gồm một gói được gọi là `fastapi-cli`, gói này cung cấp lệnh `fastapi` trong terminal.

Để chạy ứng dụng FastAPI của bạn cho quá trình phát triển (development), bạn có thể sử dụng lệnh `fastapi dev`:

<div class="termy">

In the Python developer surveys, it's clear <a href="https://www.jetbrains.com/research/python-developers-survey-2017/#tools-and-features" class="external-link" target="_blank">that one of the most used features is "autocompletion"</a>.

The whole **FastAPI** framework is based to satisfy that. Autocompletion works everywhere.

You will rarely need to come back to the docs.

Here's how your editor might help you:

		}
		b.fill() // buffer is empty
	}
	c := b.buf[b.r]
	b.r++
	b.lastByte = int(c)
	return c, nil
}

// UnreadByte unreads the last byte. Only the most recently read byte can be unread.
//
// UnreadByte returns an error if the most recent method called on the
// [Reader] was not a read operation. Notably, [Reader.Peek], [Reader.Discard], and [Reader.WriteTo] are not
// considered read operations.

In short:

* `100 - 199` are for "Information". You rarely use them directly.  Responses with these status codes cannot have a body.
* **`200 - 299`** are for "Successful" responses. These are the ones you would use the most.
    * `200` is the default status code, which means everything was "OK".
    * Another example would be `201`, "Created". It is commonly used after creating a new record in the database.

{% endfor %}
{% endfor %}
{% endfor %}

## GitHub Repositories

Most starred GitHub repositories with the topic `fastapi`:

{% for repo in topic_repos %}

  // PEM files for root certificates of Comodo and Entrust. These two CAs are sufficient to view
  // https://publicobject.com (Comodo) and https://squareup.com (Entrust). But they aren't
  // sufficient to connect to most HTTPS sites including https://godaddy.com and https://visa.com.
  // Typically developers will need to get a PEM file from their organization's TLS administrator.

And as you would be building the container image again and again during development to check that your code changes are working, there's a lot of accumulated time this would save.

import static java.util.concurrent.TimeUnit.NANOSECONDS;

import com.google.caliper.Benchmark;
import org.jspecify.annotations.NullUnmarked;

/**
 * Simple benchmark: create, start, read. This does not currently report the most useful result
 * because it's ambiguous to what extent the stopwatch benchmark is being affected by GC.
 *
 * @author Kevin Bourrillion
 */
@NullUnmarked
public class StopwatchBenchmark {
  @Benchmark

        stale-issue-label: "status:stale"