## 검증 더 추가하기 { #add-more-validations }

`min_length` 매개변수도 추가할 수 있습니다:

{* ../../docs_src/query_params_str_validations/tutorial003_an_py310.py hl[10] *}

## 정규식 추가 { #add-regular-expressions }

매개변수와 일치해야 하는 <dfn title="정규 표현식(regex 또는 regexp)은 문자열에 대한 검색 패턴을 정의하는 문자 시퀀스입니다.">정규 표현식</dfn> `pattern`을 정의할 수 있습니다:

{* ../../docs_src/query_params_str_validations/tutorial004_an_py310.py hl[11] *}

## 添加更多校验 { #add-more-validations }

你还可以添加 `min_length` 参数：

{* ../../docs_src/query_params_str_validations/tutorial003_an_py310.py hl[10] *}

## 添加正则表达式 { #add-regular-expressions }

你可以定义一个参数必须匹配的 <dfn title="正则表达式（regex 或 regexp）是用于定义字符串搜索模式的字符序列。">正则表达式</dfn> `pattern`：

{* ../../docs_src/query_params_str_validations/tutorial004_an_py310.py hl[11] *}

这个特定的正则表达式通过以下规则检查接收到的参数值：

def get_sequential_burgers(number: int):
    # Opérations séquentielles pour créer les burgers
    return burgers
```

Avec `async def`, Python sait que dans cette fonction il doit prendre en compte les expressions `await`, et qu'il peut mettre en pause ⏸ l'exécution de la fonction pour aller faire autre chose 🔀 avant de revenir.

Pour appeler une fonction définie avec `async def`, vous devez utiliser `await`. Donc ceci ne marche pas :

<h3 id="constants">Constants</h3>

<p>
Although the assembler takes its guidance from the Plan 9 assemblers,
it is a distinct program, so there are some differences.
One is in constant evaluation.
Constant expressions in the assembler are parsed using Go's operator
precedence, not the C-like precedence of the original.
Thus <code>3&amp;1&lt;&lt;2</code> is 4, not 0—it parses as <code>(3&amp;1)&lt;&lt;2</code>

def get_sequential_burgers(number: int):
    # Do some sequential stuff to create the burgers
    return burgers
```

With `async def`, Python knows that, inside that function, it has to be aware of `await` expressions, and that it can "pause" ⏸ the execution of that function and go do something else 🔀 before coming back.

When you want to call an `async def` function, you have to "await" it. So, this won't work:

```Python

defined as the partial order requirements set out by the <a href="/ref/spec">Go language specification</a>
for Go's control flow constructs as well as the <a href="/ref/spec#Order_of_evaluation">order of evaluation for expressions</a>.
</p>

<p>
A Go <i>program execution</i> is modeled as a set of goroutine executions,
together with a mapping <i>W</i> that specifies the write-like operation that each read-like operation reads from.

## バリデーションをさらに追加する { #add-more-validations }

パラメータ`min_length`も追加することができます:

{* ../../docs_src/query_params_str_validations/tutorial003_an_py310.py hl[10] *}

## 正規表現の追加 { #add-regular-expressions }

パラメータが一致するべき <dfn title="正規表現、regex、regexp は、文字列に対する検索パターンを定義する文字の並びです。">正規表現</dfn> `pattern` を定義することができます:

{* ../../docs_src/query_params_str_validations/tutorial004_an_py310.py hl[11] *}

            """
            RegEx pattern for strings.

            Read more about it in the
            [FastAPI docs about Query parameters](https://fastapi.tiangolo.com/tutorial/query-params-str-validations/#add-regular-expressions
            """
        ),
    ] = None,
    regex: Annotated[
        str | None,
        Doc(
            """
            RegEx pattern for strings.
            """
        ),

  decrease in consistency.
* Note that Javadoc and block comments i.e. `/* ... */` are not formatted,
  but line comments i.e `// ...` are.
* Negative boolean expressions must use the form `foo == false` instead of
  `!foo` for better readability of the code. This is enforced via
  Checkstyle. Conversely, you should not write e.g. `if (foo == true)`, but
  just `if (foo)`.

pkg regexp/syntax, const ErrMissingParen = "missing closing )"
pkg regexp/syntax, const ErrMissingRepeatArgument = "missing argument to repetition operator"
pkg regexp/syntax, const ErrTrailingBackslash = "trailing backslash at end of expression"
pkg regexp/syntax, const ErrUnexpectedParen = "unexpected )"
pkg regexp/syntax, const ErrUnexpectedParen ErrorCode
pkg regexp/syntax, const FoldCase = 1
pkg regexp/syntax, const InstAlt = 0