Type: p,
				Names: []*ast.Ident{
					{
						Name: t.Params().At(i).Name(),
					},
				},
			})
		}
		if t.Variadic() {
			last := params[len(params)-1]
			last.Type = &ast.Ellipsis{Elt: last.Type.(*ast.ArrayType).Elt}
		}
		var returns []*ast.Field
		for i := 0; i < t.Results().Len(); i++ {
			r := TypeExpr(f, pkg, t.Results().At(i).Type())
			if r == nil {
				return nil
			}

```Python hl_lines="7"
{!../../../docs_src/query_params_str_validations/tutorial006b.py!}
```

!!! info
    🚥 👆 🚫 👀 👈 `...` ⏭: ⚫️ 🎁 👁 💲, ⚫️ <a href="https://docs.python.org/3/library/constants.html#Ellipsis" class="external-link" target="_blank">🍕 🐍 &amp; 🤙 "❕"</a>.

    ⚫️ ⚙️ Pydantic &amp; FastAPI 🎯 📣 👈 💲 ✔.

👉 🔜 ➡️ **FastAPI** 💭 👈 👉 🔢 ✔.

### ✔ ⏮️ `None`

	if list == nil {
		return
	}

	var named, anonymous bool
	for i, field := range list.List {
		ftype := field.Type
		if t, _ := ftype.(*ast.Ellipsis); t != nil {
			ftype = t.Elt
			if variadicOk && i == len(list.List)-1 && len(field.Names) <= 1 {
				variadic = true
			} else {

```Python hl_lines="7"
{!../../../docs_src/query_params_str_validations/tutorial006b.py!}
```

!!! info
    如果你之前没见过 `...` 这种用法：它是一个特殊的单独值，它是 <a href="https://docs.python.org/3/library/constants.html#Ellipsis" class="external-link" target="_blank">Python 的一部分并且被称为「省略号」</a>。
    Pydantic 和 FastAPI 使用它来显式的声明需要一个值。

这将使 **FastAPI** 知道此查询参数是必需的。

### 使用`None`声明必需参数

	infoCopy.Name = escapeForDot(ShortenFunctionName(infoCopy.Name))
	infoCopy.Name = strings.Replace(infoCopy.Name, "::", `\n`, -1)
	// Go type parameters are reported as "[...]" by Go pprof profiles.
	// Keep this ellipsis rather than replacing with newlines below.
	infoCopy.Name = strings.Replace(infoCopy.Name, "[...]", "[…]", -1)
	infoCopy.Name = strings.Replace(infoCopy.Name, ".", `\n`, -1)
	if infoCopy.File != "" {

	if sig.variadic {
		if ddd {
			// variadic_func(a, b, c...)
			if len(call.Args) == 1 && nargs > 1 {
				// f()... is not permitted if f() is multi-valued
				check.errorf(inNode(call, call.Ellipsis), InvalidDotDotDot, "cannot use ... with %d-valued %s", nargs, call.Args[0])
				return
			}
		} else {
			// variadic_func(a, b, c)
			if nargs >= npars-1 {
				// Create custom parameters for arguments: keep

GTEST_API_ size_t GetThreadCount();

// Passing non-POD classes through ellipsis (...) crashes the ARM
// compiler and generates a warning in Sun Studio.  The Nokia Symbian
// and the IBM XL C/C++ compiler try to instantiate a copy constructor
// for objects passed through ellipsis (...), failing for uncopyable
// objects.  We define this to ensure that only POD is passed through
// ellipsis on these systems.

GTEST_API_ size_t GetThreadCount();

// Passing non-POD classes through ellipsis (...) crashes the ARM
// compiler and generates a warning in Sun Studio.  The Nokia Symbian
// and the IBM XL C/C++ compiler try to instantiate a copy constructor
// for objects passed through ellipsis (...), failing for uncopyable
// objects.  We define this to ensure that only POD is passed through
// ellipsis on these systems.

	{token.ASSIGN, "=", operator},
	{token.NOT, "!", operator},

	{token.NEQ, "!=", operator},
	{token.LEQ, "<=", operator},
	{token.GEQ, ">=", operator},
	{token.DEFINE, ":=", operator},
	{token.ELLIPSIS, "...", operator},

	{token.LPAREN, "(", operator},
	{token.LBRACK, "[", operator},
	{token.LBRACE, "{", operator},
	{token.COMMA, ",", operator},
	{token.PERIOD, ".", operator},

	if sig.variadic {
		if ddd {
			// variadic_func(a, b, c...)
			if len(call.ArgList) == 1 && nargs > 1 {
				// f()... is not permitted if f() is multi-valued
				//check.errorf(call.Ellipsis, "cannot use ... with %d-valued %s", nargs, call.ArgList[0])
				check.errorf(call, InvalidDotDotDot, "cannot use ... with %d-valued %s", nargs, call.ArgList[0])
				return
			}
		} else {
			// variadic_func(a, b, c)