* **Document** the parameter in the OpenAPI schema *path operation* (so it will show up in the **automatic docs UI**)

## Alternative (old) `Query` as the default value

Previous versions of FastAPI (before <abbr title="before 2023-03">0.95.0</abbr>) required you to use `Query` as the default value of your parameter, instead of putting it in `Annotated`, there's a high chance that you will see code using it around, so I'll explain it to you.

!!! tip

👈 "⌛ 🕳 🙆" 🛎 🔗 <abbr title="Input and Output">👤/🅾</abbr> 🛠️ 👈 📶 "🐌" (🔬 🚅 🕹 &amp; 💾 💾), 💖 ⌛:

* 📊 ⚪️➡️ 👩‍💻 📨 🔘 🕸
* 📊 📨 👆 📋 📨 👩‍💻 🔘 🕸
* 🎚 📁 💾 ✍ ⚙️ &amp; 🤝 👆 📋
* 🎚 👆 📋 🤝 ⚙️ ✍ 💾
* 🛰 🛠️ 🛠️
* 💽 🛠️ 🏁
* 💽 🔢 📨 🏁
* ♒️.

🛠️ 🕰 🍴 ✴️ ⌛ <abbr title="Input and Output">👤/🅾</abbr> 🛠️, 👫 🤙 👫 "👤/🅾 🔗" 🛠️.

Вы увидите примерно такой JSON:

```JSON
{
    "openapi": "3.0.2",
    "info": {
        "title": "FastAPI",
        "version": "0.1.0"
    },
    "paths": {
        "/items/": {
            "get": {
                "responses": {
                    "200": {

Zobaczysz JSON zaczynający się od czegoś takiego:

```JSON
{
    "openapi": "3.0.2",
    "info": {
        "title": "FastAPI",
        "version": "0.1.0"
    },
    "paths": {
        "/items/": {
            "get": {
                "responses": {
                    "200": {

# Concorrência e async / await

Detalhes sobre a sintaxe `async def` para *funções de operação de rota* e alguns conceitos de código assíncrono, concorrência e paralelismo.

## Com pressa?

<abbr title="muito longo; não li"><strong>TL;DR:</strong></abbr>

Se você estiver utilizando bibliotecas de terceiros que dizem para você chamar as funções com `await`, como:

```Python
results = await some_library()
```

META-INF/MANIFEST.MF Manifest-Version: 1.0 Archiver-Version: Plexus Archiver Created-By: Apache Maven Built-By: Brett Build-Jdk: 1.5.0_04 Extension-Name: maven-plugin-api Specification-Title: Maven is a project development management and com prehension tool. Based on the concept of a project object model: buil ds, dependency management, documentation creation, site publication, and distribution publication are all controlled from the declarative file. Maven can be extended by plugins to utilise...

            # Ref: https://github.com/pydantic/pydantic/blob/d61792cc42c80b13b23e3ffa74bc37ec7c77f7d1/pydantic/schema.py#L207
            json_schema["title"] = (
                field.field_info.title or field.alias.title().replace("_", " ")
            )
        return json_schema

    def get_compat_model_name_map(fields: List[ModelField]) -> ModelNameMap:
        return {}

	m.nat = NewNat().setBig(n)
	m.leading = _W - bitLen(m.nat.limbs[len(m.nat.limbs)-1])
	m.m0inv = minusInverseModW(m.nat.limbs[0])
	m.rr = rr(m)
	return m, nil
}

// bitLen is a version of bits.Len that only leaks the bit length of n, but not
// its value. bits.Len and bits.LeadingZeros use a lookup table for the
// low-order bits on some architectures.
func bitLen(n uint) int {
	var len int

func (k *PrivateKey) ECDH() (*ecdh.PrivateKey, error) {
	c := curveToECDH(k.Curve)
	if c == nil {
		return nil, errors.New("ecdsa: unsupported curve by crypto/ecdh")
	}
	size := (k.Curve.Params().N.BitLen() + 7) / 8
	if k.D.BitLen() > size*8 {
		return nil, errors.New("ecdsa: invalid private key")
	}
	return c.NewPrivateKey(k.D.FillBytes(make([]byte, size)))
}

func curveToECDH(c elliptic.Curve) ecdh.Curve {
	switch c {

It was created to generate the HTML in the backend, not to create APIs used by a modern frontend (like React, Vue.js and Angular) or by other systems (like <abbr title="Internet of Things">IoT</abbr> devices) communicating with it.

### <a href="https://www.django-rest-framework.org/" class="external-link" target="_blank">Django REST Framework</a>