*   TF Core:
    *   `tf.constant` always creates CPU tensors irrespective of the current
        device context.
    *   Eager `TensorHandles` maintain a list of mirrors for any copies to local
        or remote devices. This avoids any redundant copies due to op execution.
    *   For `tf.Tensor` & `tf.Variable`, `.experimental_ref()` is no longer
        experimental and is available as simply `.ref()`.

## Exécuter le code { #run-the-code }

Tous les blocs de code peuvent être copiés et utilisés directement (il s'agit en fait de fichiers Python testés).

Pour exécuter l'un de ces exemples, copiez le code dans un fichier `main.py`, et démarrez `fastapi dev` :

<div class="termy">

```console
$ <font color="#4E9A06">fastapi</font> dev

2. Définir le répertoire de travail courant sur `/code`.

    C'est là que nous placerons le fichier `requirements.txt` et le répertoire `app`.

3. Copier le fichier des dépendances vers le répertoire `/code`.

    Copier **uniquement** le fichier des dépendances en premier, pas le reste du code.

## Voir à quoi cela ressemble { #how-it-looks }

Commençons par utiliser le code et voir comment cela fonctionne, puis nous reviendrons pour comprendre ce qui se passe.

## Créer `main.py` { #create-main-py }

Copiez l'exemple dans un fichier `main.py` :

{* ../../docs_src/security/tutorial001_an_py310.py *}

## Exécuter { #run-it }

/// info

2. Defina o diretório de trabalho atual para `/code`.

    Esse é o diretório onde colocaremos o arquivo `requirements.txt` e o diretório `app`.

3. Copie o arquivo com os requisitos para o diretório `/code`.

    Copie **somente** o arquivo com os requisitos primeiro, não o resto do código.

Guillaume Nodet <******@****.***> 1729859506 +0200

to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
copies of the Software, and to permit persons to whom the Software is
furnished to do so, subject to the following conditions:

The above copyright notice and this permission notice shall be included in all
copies or substantial portions of the Software.

THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR

to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
copies of the Software, and to permit persons to whom the Software is
furnished to do so, subject to the following conditions:

The above copyright notice and this permission notice shall be included in all
copies or substantial portions of the Software.

THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR

to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
copies of the Software, and to permit persons to whom the Software is
furnished to do so, subject to the following conditions:

The above copyright notice and this permission notice shall be included in
all copies or substantial portions of the Software.

THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR

to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
copies of the Software, and to permit persons to whom the Software is
furnished to do so, subject to the following conditions:

The above copyright notice and this permission notice shall be included in all
copies or substantial portions of the Software.

THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR