# Введение в аннотации типов Python

Python имеет поддержку необязательных аннотаций типов.

**Аннотации типов** являются специальным синтаксисом, который позволяет определять <abbr title="например: str, int, float, bool">тип</abbr> переменной.

Объявление типов для переменных позволяет улучшить поддержку вашего кода редакторами и различными инструментами.

	}
	writeSuccessResponseJSON(w, resp)
}

// checkKMSActionAllowed checks for authorization for a specific action on a resource.
func checkKMSActionAllowed(r *http.Request, owner bool, cred auth.Credentials, action policy.KMSAction, resource string) bool {
	return globalIAMSys.IsAllowed(policy.Args{
		AccountName:     cred.AccessKey,
		Groups:          cred.Groups,
		Action:          policy.Action(action),

	sizes := []int{1, 6, 9, 15, 16, 20, 32, 4 << 10, 4 << 20, 64 << 20}

	b.Run("same", func(b *testing.B) {
		benchBytes(b, sizes, bmEqual(func(a, b []byte) bool { return Equal(a, a) }))
	})

	benchBytes(b, sizes, bmEqual(Equal))
}

func bmEqual(equal func([]byte, []byte) bool) func(b *testing.B, n int) {
	return func(b *testing.B, n int) {
		if len(bmbuf) < 2*n {
			bmbuf = make([]byte, 2*n)
		}
		buf1 := bmbuf[0:n]

	Company   Company
	ManagerID *uint
	Manager   *User
	Team      []User     `gorm:"foreignkey:ManagerID"`
	Languages []Language `gorm:"many2many:UserSpeak;"`
	Friends   []*User    `gorm:"many2many:user_friends;"`
	Active    bool
}

type Account struct {
	gorm.Model
	UserID sql.NullInt64
	Number string
}

type Pet struct {
	gorm.Model
	UserID *uint
	Name   string
	Toy    Toy `gorm:"polymorphic:Owner;"`
}

👉 💼, 🔢 🔢 `q` 🔜 📦, & 🔜 `None` 🔢.

/// check

👀 👈 **FastAPI** 🙃 🥃 👀 👈 ➡ 🔢 `item_id` ➡ 🔢 & `q` 🚫,, ⚫️ 🔢 🔢.

///

## 🔢 🔢 🆎 🛠️

👆 💪 📣 `bool` 🆎, & 👫 🔜 🗜:

{* ../../docs_src/query_params/tutorial003.py hl[9] *}

👉 💼, 🚥 👆 🚶:

```
http://127.0.0.1:8000/items/foo?short=1
```

⚖️

```

		Expressions: []clause.Expression{
			clause.Eq{Column: column, Value: nil},
			clause.Eq{Column: column, Value: (*string)(nil)},
			clause.Eq{Column: column, Value: (*int)(nil)},
			clause.Eq{Column: column, Value: (*bool)(nil)},
			clause.Eq{Column: column, Value: (interface{})(nil)},
			clause.Eq{Column: column, Value: sql.NullString{String: "", Valid: false}},
		},
		Result: "`column-name` IS NULL",
	}, {

	input := filepath.Join("testdata", file+".s")
	architecture, ctxt := setArch(goarch)
	architecture.Init(ctxt)
	lexer := lex.NewLexer(input)
	parser := NewParser(ctxt, architecture, lexer)
	pList := new(obj.Plist)
	var ok bool
	testOut = new(strings.Builder) // The assembler writes test output to this buffer.
	ctxt.Bso = bufio.NewWriter(os.Stdout)
	ctxt.IsAsm = true
	defer ctxt.Bso.Flush()
	failed := false

	myIndex := &migrator.Index{TableName: table, NameValue: "my_us8_index", ColumnList: []string{"name"}, PrimaryKeyValue: sql.NullBool{Bool: false, Valid: true}, UniqueValue: sql.NullBool{Bool: true, Valid: true}}

for the language's special identifiers.
*/
package builtin

import "cmp"

// bool is the set of boolean values, true and false.
type bool bool

// true and false are the two untyped boolean values.
const (
	true  = 0 == 0 // Untyped bool.
	false = 0 != 0 // Untyped bool.
)

// uint8 is the set of all unsigned 8-bit integers.
// Range: 0 through 255.
type uint8 uint8

		yamlStr string
	}
	type PrefixTemp struct {
		Prefix BatchJobPrefix `yaml:"prefix"`
	}
	tests := []struct {
		name    string
		b       PrefixTemp
		args    args
		want    []string
		wantErr bool
	}{
		{
			name: "test1",
			b:    PrefixTemp{},
			args: args{
				yamlStr: `
prefix: "foo"
`,
			},
			want:    []string{"foo"},
			wantErr: false,
		},
		{
			name: "test2",