Por exemplo, [você pode utilizar `with` para ler um arquivo](https://docs.python.org/3/tutorial/inputoutput.html#reading-and-writing-files):

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

Por baixo dos panos, o código `open("./somefile.txt")` cria um objeto que é chamado de "Gerenciador de Contexto".

        }
    }

    // Test constructor
    @Test
    public void test_constructor() {
        CorsFilter filter = new CorsFilter();
        assertNotNull(filter);
    }

    // Test OPTIONS constant
    @Test
    public void test_optionsConstant() {
        assertEquals("OPTIONS", CorsFilter.OPTIONS);
    }

    // Helper classes for testing

        }
    }

    @Nested
    @DisplayName("Pipe Flags Tests")
    class PipeFlagsTests {

        @Test
        @DisplayName("Should have correct pipe flags constant")
        void testPipeFlags() {
            int expectedFlags = (0x2019F << 16) | SmbPipeResource.PIPE_TYPE_RDWR | SmbPipeResource.PIPE_TYPE_DCE_TRANSACT;
            assertEquals(expectedFlags, DcerpcPipeHandle.pipeFlags);

   * objects, and the array itself, can be null. That is for programmer convenience, when the
   * objects come from factory methods that are themselves {@code @Nullable}. In reality neither the
   * array nor its contents can be null, but it is not useful to force the use of {@code
   * requireNonNull} or the like just to assert that.
   *
   * <p>{@code EqualsTester} will always check that every object it is given returns false from

import java.io.IOException
import okhttp3.Headers
import okhttp3.internal.delimiterOffset
import okhttp3.internal.trimSubstring
import org.codehaus.mojo.animal_sniffer.IgnoreJRERequirement

/**
 * Models the contents of a `Sec-WebSocket-Extensions` response header. OkHttp honors one extension
 * `permessage-deflate` and four parameters, `client_max_window_bits`, `client_no_context_takeover`,

Beispielsweise können Sie [„with“ verwenden, um eine Datei auszulesen](https://docs.python.org/3/tutorial/inputoutput.html#reading-and-writing-files):

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

Im Hintergrund erstellt das `open("./somefile.txt")` ein Objekt, das als „Kontextmanager“ bezeichnet wird.

- `close()`: ファイルを閉じます。

これらはすべて `async` メソッドなので、`await` する必要があります。

例えば、`async` の *path operation 関数* 内では次のように内容を取得できます:

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

通常の `def` の *path operation 関数* 内にいる場合は、`UploadFile.file` に直接アクセスできます。例えば:

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

/// note | `async` の技術詳細

`async` メソッドを使うと、**FastAPI** はファイルメソッドをスレッドプールで実行し、その完了を待機します。

///

            assertArrayEquals(originalSalt, decodedContext.getSalt());
        }
    }

    @Nested
    @DisplayName("Constant Value Tests")
    class ConstantValueTests {

        @Test
        @DisplayName("Should have correct constant values")
        void testConstantValues() {
            assertEquals(0x1, PreauthIntegrityNegotiateContext.NEGO_CTX_PREAUTH_TYPE);

   * calling {@code get(columnKey, rowKey)} on the generated table always returns the same value as
   * calling {@code get(rowKey, columnKey)} on the original table. Updating the original table
   * changes the contents of the transposed table and vice versa.
   *
   * <p>The returned table supports update operations as long as the input table supports the

  @Override
  @GwtIncompatible // NavigableSet
  ImmutableSortedSet<C> createDescendingSet() {
    return new DescendingImmutableSortedSet<>(this);
  }

  /** Returns a shorthand representation of the contents such as {@code "[1..100]"}. */
  @Override
  public String toString() {
    return range().toString();
  }

  /**
   * Not supported. {@code ContiguousSet} instances are constructed with {@link #create}. This