* `write(data)`：将 `data` (`str` 或 `bytes`) 写入文件。
* `read(size)`：读取文件中 `size` (`int`) 个字节/字符。
* `seek(offset)`：移动到文件中字节位置 `offset` (`int`)。
    * 例如，`await myfile.seek(0)` 会移动到文件开头。
    * 如果你先运行过 `await myfile.read()`，然后需要再次读取内容时，这尤其有用。
* `close()`：关闭文件。

由于这些方法都是 `async` 方法，你需要对它们使用 await。

例如，在 `async` *路径操作函数* 内，你可以这样获取内容：

```Python
contents = await myfile.read()
```

    }

    @Test
    void testReadParameterWordsWireFormat() {
        byte[] buffer = new byte[1024];
        int result = response.readParameterWordsWireFormat(buffer, 0);

        // The method should read parameter words
        assertTrue(result >= 0, "readParameterWordsWireFormat should return non-negative value");
    }

    @Test
    void testWriteBytesWireFormat() {
        byte[] dst = new byte[1024];

    protected static final String SCHEMA_LOCATION_FORMAT = "https://maven.apache.org/xsd/maven-%s.xsd";

    protected Model read(Path src) throws IOException, XMLStreamException {
        try (InputStream is = Files.newInputStream(src)) {
            return new MavenStaxReader().read(is, false, null);
        }
    }

    protected void write(Model model, Path dest) throws IOException, XMLStreamException {

/// tip | Tipp

Die nächsten Abschnitte sind **nicht unbedingt „fortgeschritten“**.

Und es ist möglich, dass für Ihren Anwendungsfall die Lösung in einem davon liegt.

///

## Das Tutorial zuerst lesen { #read-the-tutorial-first }

Die nächsten Abschnitte setzen voraus, dass Sie das Haupt-[Tutorial – Benutzerhandbuch: Sicherheit](../../tutorial/security/index.md) bereits gelesen haben.

If something seems interesting and useful to your project, go ahead and check it, but otherwise, you might probably just skip them.

/// tip

If you want to **learn FastAPI** in a structured way (recommended), go and read the [Tutorial - User Guide](../tutorial/index.md) chapter by chapter instead.

/// tip | Consejo

Las siguientes secciones no son necesariamente "avanzadas".

Y es posible que para tu caso de uso, la solución esté en una de ellas.

///

## Lee primero el Tutorial { #read-the-tutorial-first }

Las siguientes secciones asumen que ya leíste el [Tutorial - Guía del Usuario: Seguridad](../../tutorial/security/index.md) principal.

 * time while the device is asleep. Instead, create one like this:
 *
 * {@snippet :
 * Stopwatch.createStarted(
 *      new Ticker() {
 *        public long read() {
 *          return android.os.SystemClock.elapsedRealtimeNanos();
 *        }
 *      });
 * }
 *
 * @author Kevin Bourrillion
 * @since 10.0
 */
@GwtCompatible

java.nio.channels.GatheringByteChannel#write(java.nio.ByteBuffer[])
java.nio.channels.ReadableByteChannel#read(java.nio.ByteBuffer)
java.nio.channels.ScatteringByteChannel#read(java.nio.ByteBuffer[])
java.nio.channels.ScatteringByteChannel#read(java.nio.ByteBuffer[], int, int)
java.nio.channels.FileChannel#read(java.nio.ByteBuffer, long)

@defaultMessage Use Lucene.parseLenient instead it strips off minor version

	mr      *msgp.Reader
	current metaCacheEntry
	err     error // stateful error
	closer  func()
	creator func() error
}

// newMetacacheReader creates a new cache reader.
// Nothing will be read from the stream yet.
func newMetacacheReader(r io.Reader) *metacacheReader {
	dec := s2DecPool.Get()
	dec.Reset(r)
	mr := msgpNewReader(dec)
	return &metacacheReader{
		mr: mr,
		closer: func() {

            InputStream is = new ByteArrayInputStream("Hi".getBytes());
            byte[] buffer = new byte[10];

            Transport.readn(is, buffer, 0, 2); // Read all
            int bytesRead = Transport.readn(is, buffer, 0, 5); // Try to read more
            assertEquals(0, bytesRead);
        }
    }

    @Nested
    @DisplayName("Resource management tests")
    class ResourceManagementTests {