你刚刚看到的是声明类型提示的主要位置：函数参数。

这也是你在 **FastAPI** 中使用它们的主要场景。

### 简单类型 { #simple-types }

你不仅可以声明 `str`，还可以声明所有标准的 Python 类型。

例如：

* `int`
* `float`
* `bool`
* `bytes`

{* ../../docs_src/python_types/tutorial005_py310.py hl[1] *}

### typing 模块 { #typing-module }

在一些额外的用例中，你可能需要从标准库的 `typing` 模块导入内容。比如当你想声明“任意类型”时，可以使用 `typing` 中的 `Any`：

```python

		return nil, nil, err
	}

	w.Close()
	return bc.Bytes(), b.Bytes(), nil
}

const (
	// Update this whenever the official minisign pubkey is rotated.
	defaultMinisignPubkey = "RWTx5Zr1tiHQLwG9keckT0c45M3AGeHD6IvimQHpyRywVWGbP1aVSGav"
)

func verifyBinary(u *url.URL, sha256Sum []byte, releaseInfo, mode string, reader io.Reader) (err error) {
	if !updateInProgress.CompareAndSwap(0, 1) {

    assertThat(InetAddresses.fromLittleEndianByteArray(new byte[] {1, 2, 3, 4}))
        .isEqualTo(InetAddress.getByAddress(new byte[] {4, 3, 2, 1}));

    assertThat(
            InetAddresses.fromLittleEndianByteArray(
                new byte[] {1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16}))
        .isEqualTo(
            InetAddress.getByAddress(
                new byte[] {16, 15, 14, 13, 12, 11, 10, 9, 8, 7, 6, 5, 4, 3, 2, 1}));

    @Test
    @DisplayName("Test with large data")
    void testWithLargeData() {
        // Given
        byte[] largeData = new byte[1000];
        Arrays.fill(largeData, (byte) 0x42);
        transCallNamedPipe = new TransCallNamedPipe(mockConfig, TEST_PIPE_NAME, largeData, 0, largeData.length);
        byte[] dst = new byte[2000];

        // When
        int bytesWritten = transCallNamedPipe.writeDataWireFormat(dst, 0);

    @Test
    @DisplayName("Test decode method integration")
    void testDecodeMethodIntegration() throws Exception {
        byte[] buffer = new byte[1024];
        int bufferIndex = 0;

        // Prepare SMB2 header (64 bytes)
        // Protocol ID
        System.arraycopy(new byte[] { (byte) 0xFE, 'S', 'M', 'B' }, 0, buffer, bufferIndex, 4);
        // Header length
        SMBUtil.writeInt2(64, buffer, bufferIndex + 4);

	// mssql driver with issue on handling null bytes https://github.com/denisenkom/go-mssqldb/issues/530,
	b, err := json.Marshal(c)
	return string(b[:]), err
}

func (c *Content) Scan(src interface{}) error {
	var value Content
	str, ok := src.(string)
	if !ok {
		byt, ok := src.([]byte)
		if !ok {
			return errors.New("Embedded.Scan byte assertion failed")
		}

	o = msgp.AppendBool(o, z.BitrotScan)
	return
}

// UnmarshalMsg implements msgp.Unmarshaler
func (z *PartialOperation) UnmarshalMsg(bts []byte) (o []byte, err error) {
	var field []byte
	_ = field
	var zb0001 uint32
	zb0001, bts, err = msgp.ReadMapHeaderBytes(bts)
	if err != nil {
		err = msgp.WrapError(err)
		return
	}
	for zb0001 > 0 {
		zb0001--

  TF_DeleteBuffer(attr_buf);

  // Set attr
  tensorflow::AttrValue attr;
  attr.set_s("test_attr_value");
  std::string bytes;
  attr.SerializeToString(&bytes);
  TF_FunctionSetAttrValueProto(func_, "test_attr_name", bytes.data(),
                               bytes.size(), s_);
  ASSERT_EQ(TF_OK, TF_GetCode(s_)) << TF_Message(s_);

  // Get attr
  AttrValue read_attr;

	// Directory defines the directory where log files will be written to.
	// If the directory does not exist, it will be created.
	Directory string

	// MaximumFileSize defines the maximum size of each log file in bytes.
	MaximumFileSize int64

	// FileNameFunc specifies the name a new file will take.
	// FileNameFunc must ensure collisions in filenames do not occur.
	// Do not rely on timestamps to be unique, high throughput writes

      } else {
        threadToCancel!!.interrupt()
      }
      latch.countDown()
    }.apply { start() }
    return latch
  }

  companion object {
    // The size of the socket buffers in bytes.
    private const val SOCKET_BUFFER_SIZE = 256 * 1024
  }
}

class CancelModelParamProvider : SimpleProvider() {
  override fun arguments() =
    CancelTest.CancelMode.values().flatMap { c ->