위의 코드는:

```Python
response = client.get('/')
```

`TestClient` 에 요청을 보내던 것과 동일합니다.

/// tip | 팁

새로운 `AsyncClient`를 사용할 때 async/await를 사용하고 있다는 점에 주목하세요. 이 요청은 비동기적으로 처리됩니다.

///

/// warning | 경고

만약의 어플리케이션이 Lifespan 이벤트에 의존성을 갖고 있다면 `AsyncClient` 가 이러한 이벤트를 실행시키지 않습니다.
`AsyncClient` 가 테스트를 실행시켰다는 것을 확인하기 위해

  if len(curr_version) > 1:
    print('WARNING: current clang installation is not a release version.\n')

  curr_version = curr_version[0]
  curr_version_int = convert_version_to_int(curr_version)
  # Check if current clang version can be detected properly.
  if not curr_version_int:
    print('WARNING: current clang installation version unknown.\n')
    return None

      this.method = null
      this.path = null
    }
  }

  @Deprecated(
    message = "Use body.readUtf8()",
    replaceWith = ReplaceWith("body.readUtf8()"),
    level = DeprecationLevel.WARNING,
  )
  fun getUtf8Body(): String = body.readUtf8()

  fun getHeader(name: String): String? = headers.values(name).firstOrNull()

  override fun toString(): String = requestLine

   */
  @ParametricNullness
  T get();

  /**
   * <i>May</i> return {@code true} if {@code object} is a {@code Supplier} that behaves identically
   * to this supplier.
   *
   * <p><b>Warning: do not depend</b> on the behavior of this method.
   *
   * <p>Historically, {@code Supplier} instances in this library have implemented this method to

   * time and space.
   *
   * @throws IllegalArgumentException if {@code sequence} contains ill-formed UTF-16 (unpaired
   *     surrogates)
   */
  public static int encodedLength(CharSequence sequence) {
    // Warning to maintainers: this implementation is highly optimized.
    int utf16Length = sequence.length();
    int utf8Length = utf16Length;
    int i = 0;

    // This loop optimizes for pure ASCII.

Se por algum motivo você precisar desabilitar a conversão automática de sublinhados para hífens, defina o parâmetro `convert_underscores` de `Header` para `False`:

{* ../../docs_src/header_params/tutorial002_py310.py hl[8] *}

/// warning | Aviso

Antes de definir `convert_underscores` como `False`, lembre-se de que alguns proxies e servidores HTTP não permitem o uso de cabeçalhos com sublinhados.

///

## Cabeçalhos duplicados

///

/// warning | Advertencia

///

/// warning

    private const val FILE_HEADER_SIZE = 32L

    /**
     * Creates a new relay that reads a live stream from [upstream], using [file] to share that data
     * with other sources.
     *
     * **Warning:** callers to this method must immediately call [newSource] to create a source and
     * close that when they're done. Otherwise a handle to [file] will be leaked.
     */
    @Throws(IOException::class)
    fun edit(

    private SetView() {} // no subclasses but our own

    /**
     * Returns an immutable copy of the current contents of this set view. Does not support null
     * elements.
     *
     * <p><b>Warning:</b> this may have unexpected results if a backing set of this view uses a
     * nonstandard notion of equivalence, for example if it is a {@link TreeSet} using a comparator