Si votre code ne peut pas utiliser `|` pour une raison quelconque, par exemple si ce n'est pas dans une annotation de type mais dans quelque chose comme `response_model=`, au lieu d'utiliser la barre verticale (`|`) vous pouvez utiliser `Union` de `typing`.

Par exemple, vous pourriez déclarer que quelque chose peut être un `str` ou `None` :

```python
from typing import Union


def say_hi(name: Union[str, None]):

## Deploy to other cloud providers { #deploy-to-other-cloud-providers }

FastAPI is open source and based on standards. You can deploy FastAPI apps to any cloud provider you choose.

Follow your cloud provider's guides to deploy FastAPI apps with them. 🤓

## Deploy your own server { #deploy-your-own-server }

  }

  private WeakReference<ClosingFuture<String>> leakClosingFuture(TestCloseable closeable) {
    ClosingFuture<String> willCloseCloseable =
        ClosingFuture.submit(
            closer -> {
              closer.eventuallyClose(closeable, directExecutor());
              return "";
            },
            directExecutor());
    return new WeakReference<>(willCloseCloseable);
  }

  }

  private WeakReference<ClosingFuture<String>> leakClosingFuture(TestCloseable closeable) {
    ClosingFuture<String> willCloseCloseable =
        ClosingFuture.submit(
            closer -> {
              closer.eventuallyClose(closeable, directExecutor());
              return "";
            },
            directExecutor());
    return new WeakReference<>(willCloseCloseable);
  }

func (p *parallelReader) Done() {
	if p.stashBuffer != nil {
		globalBytePoolCap.Load().Put(p.stashBuffer)
		p.stashBuffer = nil
	}
}

// preferReaders can mark readers as preferred.
// These will be chosen before others.
func (p *parallelReader) preferReaders(prefer []bool) {
	if len(prefer) != len(p.orgReaders) {
		return
	}
	// Copy so we don't change our input.
	tmp := make([]io.ReaderAt, len(p.orgReaders))

    } catch (NoSuchMethodException e) {
      return false;
    }
  }

  abstract static class Chopper {

    final Chopper or(Chopper you) {
      Chopper i = this;
      return new Chopper() {
        @Override
        @Nullable String chop(String str) {
          String result = i.chop(str);
          return result != null ? result : you.chop(str);

    manifest.getMainAttributes().put(Attributes.Name.CLASS_PATH, jarFile.getName());

    Closer closer = Closer.create();
    try {
      FileOutputStream fileOut = closer.register(new FileOutputStream(jarFile));
      JarOutputStream jarOut = closer.register(new JarOutputStream(fileOut, manifest));
      for (String entry : entries) {
        jarOut.putNextEntry(new ZipEntry(entry));

    }

    @Override
    public byte[] read() throws IOException {
      Closer closer = Closer.create();
      try {
        FileInputStream in = closer.register(openStream());
        return ByteStreams.toByteArray(in, in.getChannel().size());
      } catch (Throwable e) {
        throw closer.rethrow(e);
      } finally {
        closer.close();
      }
    }

    @Override
    public String toString() {

// To signify no more results are on an input channel, close it.
// The output channel will be closed when all inputs are emptied.
// If file names are equal, compareMeta is called to select which one to choose.
// The entry not chosen will be discarded.
// If the context is canceled the function will return the error,
// otherwise the function will return nil.

  // https://docs.oracle.com/en/java/javase/25/security/java-cryptography-architecture-jca-reference-guide.html#:~:text=How%20Provider%20Implementations%20Are%20Requested%20and%20Supplied
  //  - Some providers may choose to also include alias names.
  //  - For example, the "SHA-1" algorithm might be referred to as "SHA1".
  //  - The algorithm name is not case-sensitive.