func (TL) Method1() {}
func (TL) Method2() {}

type T8 uint8
type T16 uint16
type T32 uint32
type T64 uint64
type Tstr string
type Tslice []byte

func (T8) Method1()     {}
func (T16) Method1()    {}
func (T32) Method1()    {}
func (T64) Method1()    {}
func (Tstr) Method1()   {}
func (Tslice) Method1() {}

var (
	e  any
	e_ any
	i1 I1
	i2 I2
	ts TS
	tm TM
	tl TL
	ok bool
)

	} {
		i, ok := new(Int).SetString(test.istr, 0)
		if !ok {
			t.Errorf("SetString(%s) failed", test.istr)
			continue
		}

		// Test against expectation.
		f, acc := i.Float64()
		if f != test.f || acc != test.acc {
			t.Errorf("%s: got %f (%s); want %f (%s)", test.istr, f, acc, test.f, test.acc)
		}

		if i < len(sub) {
			istr, iflags = p.leadingString(sub[i])
			if iflags == strflags {
				same := 0
				for same < len(str) && same < len(istr) && str[same] == istr[same] {
					same++
				}
				if same > 0 {
					// Matches at least one rune in current range.
					// Keep going around.
					str = str[:same]
					continue
				}
			}
		}

}

func (ss SortableSliceOfMaps) Len() int {
	return len(ss.s)
}

func (ss SortableSliceOfMaps) Less(i, j int) bool {
	iStr := fmt.Sprintf("%v", ss.s[i][ss.k])
	jStr := fmt.Sprintf("%v", ss.s[j][ss.k])
	return sort.StringsAreSorted([]string{iStr, jStr})
}

func (ss SortableSliceOfMaps) Swap(i, j int) {
	tmp := ss.s[i]
	ss.s[i] = ss.s[j]
	ss.s[j] = tmp
}

static void*
compf(const regex_t* re, const char* xstr, size_t xlen, regdisc_t* disc)
{
	Disc_t*		dp = (Disc_t*)disc;

	return (void*)((char*)0 + ++dp->ordinal);
}

static int
execf(const regex_t* re, void* data, const char* xstr, size_t xlen, const char* sstr, size_t slen, char** snxt, regdisc_t* disc)
{
	Disc_t*		dp = (Disc_t*)disc;

	sfprintf(dp->sp, "{%-.*s}(%lu:%d)", xlen, xstr, (char*)data - (char*)0, slen);

// Copyright 2017 The Go Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.

// Package str provides string manipulation utilities.
package str

import (
	"fmt"
	"strings"
	"unicode"
	"unicode/utf8"
)

// StringList flattens its arguments into a single []string.
// Each argument in args must have type string or []string.

    ```

The query parameter `q` is of type `Union[str, None]` (or `str | None` in Python 3.10), that means that it's of type `str` but could also be `None`, and indeed, the default value is `None`, so FastAPI will know it's not required.

!!! note
    FastAPI will know that the value of `q` is not required because of the default value `= None`.

```

Le paramètre de requête `q` a pour type `Union[str, None]` (ou `str | None` en Python 3.10), signifiant qu'il est de type `str` mais pourrait aussi être égal à `None`, et bien sûr, la valeur par défaut est `None`, donc **FastAPI** saura qu'il n'est pas requis.

!!! note
    **FastAPI** saura que la valeur de `q` n'est pas requise grâce à la valeur par défaut `= None`.

```Python hl_lines="9"
{!../../../docs_src/query_params_str_validations/tutorial001.py!}
```

쿼리 매개변수 `q`는 `Optional[str]` 자료형입니다. 즉, `str` 자료형이지만 `None` 역시 될 수 있음을 뜻하고, 실제로 기본값은 `None`이기 때문에 FastAPI는 이 매개변수가 필수가 아니라는 것을 압니다.

!!! note "참고"
    FastAPI는 `q`의 기본값이 `= None`이기 때문에 필수가 아님을 압니다.

    `Optional[str]`에 있는 `Optional`은 FastAPI가 사용하는게 아니지만, 편집기에게 더 나은 지원과 오류 탐지를 제공하게 해줍니다.

## 추가 검증

    {!> ../../../docs_src/query_params_str_validations/tutorial001_py310.py!}
    ```

🔢 🔢 `q` 🆎 `Union[str, None]` (⚖️ `str | None` 🐍 3️⃣.1️⃣0️⃣), 👈 ⛓ 👈 ⚫️ 🆎 `str` ✋️ 💪 `None`, & 👐, 🔢 💲 `None`, FastAPI 🔜 💭 ⚫️ 🚫 ✔.

!!! note
    FastAPI 🔜 💭 👈 💲 `q` 🚫 ✔ ↩️ 🔢 💲 `= None`.

     `Union` `Union[str, None]` 🔜 ✔ 👆 👨‍🎨 🤝 👆 👍 🐕‍🦺 & 🔍 ❌.

## 🌖 🔬