"item_id"
            ],
            "msg": "value is not a valid integer",
            "type": "type_error.integer"
        }
    ]
}
```

경로 매개변수 `item_id`는 `int`가 아닌 `"foo"` 값이기 때문입니다.

`int`가 아닌 `float`을 전달하는 경우에도 동일한 오류가 나타납니다: <a href="http://127.0.0.1:8000/items/4.2" class="external-link" target="_blank">http://127.0.0.1:8000/items/4.2</a>

/// check | 확인

        @Test
        @DisplayName("Second constructor sets unshared based on flags")
        void secondCtorUnsharedFlagPath() throws Exception {
            // Arrange: include UNSHARED flag to exercise that branch
            int flags = SmbPipeResource.PIPE_TYPE_RDWR | SmbPipeResource.PIPE_TYPE_UNSHARED;

            // Act
            SmbNamedPipe pipe = new SmbNamedPipe("smb://server/IPC$/foo", flags, ctx());

    };
  }

  // cloned from ImmutableCollection
  private static int expandedCapacity(int oldCapacity, int minCapacity) {
    if (minCapacity < 0) {
      throw new IllegalArgumentException("cannot store more than Integer.MAX_VALUE elements");
    } else if (minCapacity <= oldCapacity) {
      return oldCapacity;
    }
    // careful of overflow!
    int newCapacity = oldCapacity + (oldCapacity >> 1) + 1;

    this.map = map;
  }

  @Override
  public int size() {
    return map.size();
  }

  @Override
  public UnmodifiableIterator<K> iterator() {
    return map.keyIterator();
  }

  @Override
  public boolean contains(@Nullable Object object) {
    return map.containsKey(object);
  }

  @Override
  K get(int index) {
    return map.entrySet().asList().get(index).getKey();
  }

class SocketOutputStream extends FilterOutputStream {

    SocketOutputStream(final OutputStream out) {
        super(out);
    }

    @Override
    public synchronized void write(final byte[] b, int off, final int len) throws IOException {
        if (len > 0xFFFF) {
            throw new IOException("write too large: " + len);
        }
        if (off < 4) {

 */
public class NdrSmall extends NdrObject {

    /**
     * The small integer value (0-255)
     */
    public int value;

    /**
     * Constructs an NdrSmall with the specified value
     * @param value the small integer value (will be masked to 0-255 range)
     */
    public NdrSmall(final int value) {
        this.value = value & 0xFF;
    }

    @Override

      }
    }
  }

  fun proxy(): Proxy =
    Proxy(
      Proxy.Type.SOCKS,
      InetSocketAddress.createUnresolved("localhost", serverSocket!!.localPort),
    )

  fun connectionCount(): Int = connectionCount.get()

  fun shutdown() {
    serverSocket!!.close()
    executor.shutdown()
    if (!executor.awaitTermination(5, TimeUnit.SECONDS)) {
      throw IOException("Gave up waiting for executor to shut down")

    };
  }

  // cloned from ImmutableCollection
  private static int expandedCapacity(int oldCapacity, int minCapacity) {
    if (minCapacity < 0) {
      throw new IllegalArgumentException("cannot store more than Integer.MAX_VALUE elements");
    } else if (minCapacity <= oldCapacity) {
      return oldCapacity;
    }
    // careful of overflow!
    int newCapacity = oldCapacity + (oldCapacity >> 1) + 1;

	lex           lex.TokenReader
	lineNum       int   // Line number in source file.
	errorLine     int   // Line number of last error.
	errorCount    int   // Number of errors.
	sawCode       bool  // saw code in this file (as opposed to comments and blank lines)
	pc            int64 // virtual PC; count of Progs; doesn't advance for GLOBL or DATA.
	input         []lex.Token
	inputPos      int

Ele também declara novamente `id: int`. Ao fazer isso, estamos fazendo um **contrato** com os clientes da API, para que eles possam sempre esperar que o `id` estará lá e será um `int` (nunca será `None`).

/// tip | Dica