some_file_path = "large-video-file.mp4"
app = FastAPI()


@app.get("/")
def main():
    def iterfile():  # (1)
        with open(some_file_path, mode="rb") as file_like:  # (2)
            yield from file_like  # (3)

3. Este `yield from` le dice a la función que itere sobre esa cosa llamada `file_like`. Y luego, para cada parte iterada, yield esa parte como proveniente de esta función generadora (`iterfile`).

    Entonces, es una función generadora que transfiere el trabajo de "generar" a algo más internamente.

3. This `yield from` tells the function to iterate over that thing named `file_like`. And then, for each part iterated, yield that part as coming from this generator function (`iterfile`).

    So, it is a generator function that transfers the "generating" work to something else internally.

3. Dieses `yield from` weist die Funktion an, über das Ding namens `file_like` zu iterieren. Und dann für jeden iterierten Teil, diesen Teil so zurückzugeben, als wenn er aus dieser Generatorfunktion (`iterfile`) stammen würde.

    Es handelt sich also hier um eine Generatorfunktion, die die „generierende“ Arbeit intern auf etwas anderes überträgt.

3. Этот `yield from` говорит функции итерироваться по объекту с именем `file_like`. И затем, для каждой итерации, отдавать эту часть как исходящую из этой функции-генератора (`iterfile`).

   Таким образом, это функция-генератор, которая внутренне передаёт работу по «генерации» чему-то другому.

3. Essa declaração `yield from` informa a função para iterar sobre essa coisa nomeada de `file_like`. E então, para cada parte iterada, fornece essa parte como se viesse dessa função geradora (`iterfile`).

    Então, é uma função geradora que transfere o trabalho de "geração" para alguma outra coisa interna.

    /**
     * Returns an {@link Iterable} that wraps a {@link ClassIterator} for use in a for-each statement.
     *
     * @param clazz the class (must not be {@literal null})
     * @return an {@link Iterable} wrapping a {@link ClassIterator}
     */
    public static Iterable<Class<?>> iterable(final Class<?> clazz) {
        return iterable(clazz, true);
    }

    /**

    }

    /**
     * Returns an {@link Iterable} that wraps a {@link LineIterator} for use in enhanced for-loops.
     *
     * @param reader
     *            The {@link BufferedReader} to read strings from. Must not be {@literal null}.
     * @return An {@link Iterable} that wraps a {@link LineIterator}.
     */
    public static Iterable<String> iterable(final BufferedReader reader) {

    private final boolean errors;

    private final T value;

    private final Iterable<? extends ModelProblem> problems;

    private Result(boolean errors, T model, Iterable<? extends ModelProblem> problems) {
        this.errors = errors;
        this.value = model;
        this.problems = problems;
    }

    public Iterable<? extends ModelProblem> getProblems() {
        return problems;
    }

    protected int index = 0;

    /**
     * Returns an {@link Iterable} that wraps the array for use in a for-each statement.
     *
     * @param <T> the type of elements
     * @param items the array of elements to iterate (must not be {@literal null})
     * @return an {@link Iterable} wrapping the array
     */
    public static <T> Iterable<T> iterable(final T... items) {
        assertArgumentNotNull("items", items);