# Features { #features }

## FastAPI features { #fastapi-features }

**FastAPI** gives you the following:

### Based on open standards { #based-on-open-standards }

例えば、<a href="https://docs.python.org/3/tutorial/inputoutput.html#reading-and-writing-files" class="external-link" target="_blank">ファイルを読み込むには`with`を使用することができます</a>:

```Python
with open("./somefile.txt") as f:
    contents = f.read()
    print(contents)
```

その後の`open("./somefile.txt")`は「コンテキストマネージャ」と呼ばれるオブジェクトを作成します。

`with`ブロックが終了すると、例外があったとしてもファイルを確かに閉じます。

`yield`を依存関係を作成すると、**FastAPI** は内部的にそれをコンテキストマネージャに変換し、他の関連ツールと組み合わせます。

   * EPUB is the distribution and interchange format standard for digital publications and
   * documents. This media type is defined in the <a
   * href="http://www.idpf.org/epub/30/spec/epub30-ocf.html">EPUB Open Container Format</a>
   * specification.
   *
   * @since 15.0
   */
  public static final MediaType EPUB = createConstant(APPLICATION_TYPE, "epub+zip");

  public static final MediaType FORM_DATA =

    /** No process is on the other end of the pipe */
    int NT_STATUS_PIPE_DISCONNECTED = 0xC00000b0;
    /** The pipe is being closed */
    int NT_STATUS_PIPE_CLOSING = 0xC00000b1;
    /** Waiting for a process to open the other end of the pipe */
    int NT_STATUS_PIPE_LISTENING = 0xC00000b3;
    /** The file that was specified is a directory */
    int NT_STATUS_FILE_IS_A_DIRECTORY = 0xC00000ba;

### `StreamingResponse`

✊ 🔁 🚂 ⚖️ 😐 🚂/🎻 & 🎏 📨 💪.

{* ../../docs_src/custom_response/tutorial007.py hl[2,14] *}

#### ⚙️ `StreamingResponse` ⏮️ 📁-💖 🎚

🚥 👆 ✔️ 📁-💖 🎚 (✅ 🎚 📨 `open()`), 👆 💪 ✍ 🚂 🔢 🔁 🤭 👈 📁-💖 🎚.

👈 🌌, 👆 🚫 ✔️ ✍ ⚫️ 🌐 🥇 💾, & 👆 💪 🚶‍♀️ 👈 🚂 🔢 `StreamingResponse`, & 📨 ⚫️.

👉 🔌 📚 🗃 🔗 ⏮️ ☁ 💾, 📹 🏭, & 🎏.

import com.google.caliper.Benchmark;
import com.google.caliper.Param;
import org.jspecify.annotations.NullUnmarked;

/**
 * Benchmarks against the Apache Commons Math utilities.
 *
 * <p>Note: the Apache benchmarks are not open sourced to avoid the extra dependency.
 *
 * @author Louis Wasserman
 */
@NullUnmarked
public class ApacheBenchmark {
  private enum Impl {
    GUAVA {
      @Override

```Python
with open("./somefile.txt") as f:
    contents = f.read()
    print(contents)
```

Underneath, the `open("./somefile.txt")` creates an object that is called a "Context Manager".

When the `with` block finishes, it makes sure to close the file, even if there were exceptions.

    assertEquals(set, Sets.subSet(set, Range.open(0, 12)));
    assertEquals(ImmutableSortedSet.of(2), Sets.subSet(set, Range.open(0, 4)));
    assertEquals(ImmutableSortedSet.of(4), Sets.subSet(set, Range.open(2, 6)));
    assertEquals(ImmutableSortedSet.of(4, 6), Sets.subSet(set, Range.open(3, 7)));
    assertEquals(empty, Sets.subSet(set, Range.open(20, 30)));

	Context                  context.Context
	Logger                   logger.Interface
	NowFunc                  func() time.Time
	CreateBatchSize          int
}

// Open initialize db session based on dialector
func Open(dialector Dialector, opts ...Option) (db *DB, err error) {
	config := &Config{}

	sort.Slice(opts, func(i, j int) bool {
		_, isConfig := opts[i].(*Config)
		_, isConfig2 := opts[j].(*Config)

        super(th, parent, wildcard, filter, searchAttributes);
    }

    @SuppressWarnings("resource")
    @Override
    protected final FileEntry open() throws CIFSException {
        final SmbResourceLocator loc = this.getParent().getLocator();
        final String unc = loc.getUNCPath();
        final String p = loc.getURL().getPath();