Primero, necesitas importar `BaseModel` de `pydantic`:

{* ../../docs_src/body/tutorial001_py310.py hl[2] *}

## Crea tu modelo de datos { #create-your-data-model }

Luego, declaras tu modelo de datos como una clase que hereda de `BaseModel`.

Usa tipos estándar de Python para todos los atributos:

{* ../../docs_src/body/tutorial001_py310.py hl[5:9] *}

import (
	"sync"
	"time"
)

// EvictCallback is used to get a callback when a cache entry is evicted
type EvictCallback[K comparable, V any] func(key K, value V)

// LRU implements a thread-safe LRU with expirable entries.
type LRU[K comparable, V any] struct {
	size      int
	evictList *LruList[K, V]
	items     map[K]*Entry[K, V]
	onEvict   EvictCallback[K, V]

	// expirable options
	mu   sync.Mutex

	}

	r.wg.Add(1)
	defer r.wg.Done()
	n, err = r.read(p)
	for err == ErrIsEmpty && r.block {
		r.writeCond.Wait()
		if err = r.readErr(true); err != nil {
			break
		}
		n, err = r.read(p)
	}
	if r.block && n > 0 {
		r.readCond.Broadcast()
	}
	return n, err
}

// TryRead read up to len(p) bytes into p like Read but it is not blocking.

    checkNotNull(runnable, "Runnable was null.");
    checkNotNull(executor, "Executor was null.");

    // Lock while we check state. We must maintain the lock while adding the new pair so that
    // another thread can't run the list out from under us. We only add to the list if we have not
    // yet started execution.
    synchronized (this) {
      if (!executed) {

        // start
        AccessTimeoutTarget accessTimeoutTarget = null;
        TimeoutTask accessTimeoutTask = null;
        if (accessTimeout != null) {
            accessTimeoutTarget = new AccessTimeoutTarget(Thread.currentThread());
            accessTimeoutTask = TimeoutManager.getInstance().addTimeoutTarget(accessTimeoutTarget, accessTimeout, false);
        }

        try {

## `fastapi dev` { #fastapi-dev }

Ejecutar `fastapi dev` inicia el modo de desarrollo.

 * violate the {@code Set} contract.
 *
 * <p>The {@code standard} methods and the collection views they return are not guaranteed to be
 * thread-safe, even when all of the methods that they depend on are thread-safe.
 *
 * @author Mike Bostock
 * @author Louis Wasserman
 * @since 2.0
 */
@GwtCompatible
/*

    }

    @Test
    @DisplayName("read(byte[],off,0): returns 0 without I/O")
    void read_lenZero_returnsZero() throws Exception {
        SmbRandomAccessFile raf = newInstance("r", false, false, false);
        byte[] buf = new byte[4];
        assertEquals(0, raf.read(buf, 0, 0));
    }

    @Test
    @DisplayName("read(): returns -1 when underlying read reports EOF")

    /**
     * Creates a {@link Reader} to read from a file with the specified encoding.
     *
     * @param is
     *            the input stream (must not be {@literal null})
     * @param encoding
     *            the encoding of the input stream (must not be {@literal null} or empty)
     * @return a {@link Reader} to read from the file
     */

if NOT "%FESS_HEAP_SIZE%" == "" set FESS_MAX_MEM=%FESS_HEAP_SIZE%

call:convertxm %FESS_MIN_MEM% JVM_XMS
call:convertxm %FESS_MAX_MEM% JVM_XMX

CALL "%FESS_HOME%\bin\fess.in.bat"

rem thread stack size
set JVM_SS=256