{!> ../../docs_src/body_nested_models/tutorial002.py!}
```

### Declare a `list` with a type parameter

To declare types that have type parameters (internal types), like `list`, `dict`, `tuple`:

* If you are in a Python version lower than 3.9, import their equivalent version from the `typing` module
* Pass the internal type(s) as "type parameters" using square brackets: `[` and `]`

In Python 3.9 it would be:

```Python

the operation would become deadlocked if the channels are full.

### Typed handlers

Typed handlers are handlers that have a specific type for the request and response payloads.

```go
    // Create a typed handler.
    handler := func(ctx context.Context, p *Payload, in <-chan *Req, out chan<- *Resp) *RemoteErr {

pkg go/ast, func Unparen(Expr) Expr #60061
pkg go/ast, type Importer //deprecated #52463
pkg go/ast, type Object //deprecated #52463
pkg go/ast, type Package //deprecated #52463
pkg go/ast, type Scope //deprecated #52463
pkg go/types, func NewAlias(*TypeName, Type) *Alias #63223
pkg go/types, func Unalias(Type) Type #63223
pkg go/types, method (*Alias) Obj() *TypeName #63223
pkg go/types, method (*Alias) String() string #63223

      }

      private /*static*/ <S> S doConvert(TypeToken<S> type) {
        return checkNotNull(getDefaultValue(type));
      }
    };
  }

  private static TypeToken<?> getFirstTypeParameter(Type type) {
    if (type instanceof ParameterizedType) {
      return TypeToken.of(((ParameterizedType) type).getActualTypeArguments()[0]);
    } else {
      return TypeToken.of(Object.class);
    }

Jeśli potrzebujesz szybkiego przypomnienia jak używać deklaracji typów w Pythonie (nawet jeśli nie używasz FastAPI), sprawdź krótki samouczek: [Python Types](python-types.md){.internal-link target=_blank}.

Wystarczy, że napiszesz standardowe deklaracje typów Pythona:

```Python
from datetime import date

from pydantic import BaseModel

# Zadeklaruj parametr jako str

   * given types. Otherwise, it will be rethrown wrapped in a {@code RuntimeException}. <b>Note:</b>
   * Be sure to declare all of the checked exception types your try block can throw when calling an
   * overload of this method so as to avoid losing the original exception type.
   *

  private static void assertFreshInstances(Class<?>... types) {
    for (Class<?> type : types) {
      assertFreshInstance(type, 2);
    }
  }

  private static void assertFreshInstance(TypeToken<?> type) {
    assertFreshInstance(type, 3);
  }

  private static void assertFreshInstance(Class<?> type, int instances) {
    assertFreshInstance(TypeToken.of(type), instances);
  }

import (
	"encoding/json"
	"encoding/xml"
)

// Name - event type enum.
// Refer http://docs.aws.amazon.com/AmazonS3/latest/dev/NotificationHowTo.html#notification-how-to-event-types-and-destinations
// for most basic values we have since extend this and its not really much applicable other than a reference point.
// "s3:Replication:OperationCompletedReplication" is a MinIO extension.
type Name int

// Values of event Name
const (

  public void testWhere_noMapping() {
    Type t = aTypeVariable();
    assertEquals(t, new TypeResolver().resolveType(t));
  }

  public void testWhere_typeVariableMapping() {
    Type t = aTypeVariable();
    assertEquals(String.class, new TypeResolver().where(t, String.class).resolveType(t));
  }

  public <T> void testWhere_indirectMapping() {
    Type t1 = new TypeCapture<T>() {}.capture();

name: "Issue Labeler"
on:
  issues:
    types: [opened, edited, reopened]
  pull_request:
    types: [opened, edited, reopened]

jobs:
  triage:
    runs-on: ubuntu-latest
    name: Label issues and pull requests
    steps:
      - name: check out
        uses: actions/checkout@v4

      - name: labeler
        uses: jinzhu/super-labeler-action@develop
        with: