```

That means that the system will now start looking first look for programs in:

```plaintext
/home/user/code/awesome-project/.venv/bin
```

before looking in the other directories.

So, when you type `python` in the terminal, the system will find the Python program in

```plaintext
/home/user/code/awesome-project/.venv/bin/python
```

and use that one.

////

//// tab | Windows

 *
 * <p>As of Guava 23.0, this class is thread-safe and lock-free. It internally uses atomics and
 * compare-and-swap to ensure correctness when multiple threads are used to access it.
 *
 * @param <T> the type of instances that the {@code BloomFilter} accepts
 * @author Dimitris Andreou
 * @author Kevin Bourrillion
 * @since 11.0 (thread-safe since 23.0)
 */
@Beta
@ElementTypesAreNonnullByDefault

- <a href="https://docs.pydantic.dev/latest/usage/pydantic_settings/" target="_blank"><code>pydantic-settings</code></a> - 用於設定管理。
- <a href="https://docs.pydantic.dev/latest/usage/types/extra_types/extra_types/" target="_blank"><code>pydantic-extra-types</code></a> - 用於與 Pydantic 一起使用的額外型別。

用於 Starlette：

- <a href="https://www.python-httpx.org" target="_blank"><code>httpx</code></a> - 使用 `TestClient`時必須安裝。

						   maxlength="1000"
						   placeholder="<la:message key="labels.sidebar.placeholder_search" />">
					<div class="input-group-append">
						<button class="btn btn-sidebar" type="submit" name="search" id="search-btn">
							<em class="fa fa-search">
						</button>
					</div>
				</div>
			</form>
		</c:if>
		<nav class="mt-2">

 * {@code long} values. When possible, it is recommended that the {@link UnsignedLong} wrapper class
 * be used, at a small efficiency penalty, to enforce the distinction in the type system.
 *
 * <p>See the Guava User Guide article on <a
 * href="https://github.com/google/guava/wiki/PrimitivesExplained#unsigned-support">unsigned
 * primitive utilities</a>.
 *
 * @author Louis Wasserman

contents of the Program, including, for purposes of clarity any new file
in Source Code form that contains any contents of the Program. Modified
Works shall not include works that contain only declarations,
interfaces, types, classes, structures, or files of the Program solely
in each case in order to link to, bind by name, or subclass the Program
or Modified Works thereof.

"Distribute" means the acts of a) distributing or b) making available

   * parameters used to build this multimap.
   */
  @Override
  public ImmutableSet<V> get(K key) {
    // This cast is safe as its type is known in constructor.
    ImmutableSet<V> set = (ImmutableSet<V>) map.get(key);
    return MoreObjects.firstNonNull(set, emptySet);
  }

   */
  public static final byte DEL = 127;

  /**
   * The minimum value of an ASCII character.
   *
   * @since 9.0 (was type {@code int} before 12.0)
   */
  public static final char MIN = 0;

  /**
   * The maximum value of an ASCII character.
   *
   * @since 9.0 (was type {@code int} before 12.0)
   */
  public static final char MAX = 127;

//// tab | Python 3.8+

```Python hl_lines="15  19  24"
{!> ../../docs_src/dependencies/tutorial001_02_an.py!}
```

////

/// tip | "Подсказка"

Это стандартный синтаксис python и называется "type alias", это не особенность **FastAPI**.

Но потому что **FastAPI** базируется на стандартах Python,  включая `Annotated`, вы можете использовать этот трюк в вашем коде. 😎

///

```JSON
{
    "detail": [
        {
            "loc": [
                "path",
                "item_id"
            ],
            "msg": "value is not a valid integer",
            "type": "type_error.integer"
        }
    ]
}
```

devido ao parâmetro da rota `item_id` ter um valor `"foo"`, que não é um `int`.