fileModified, errChan := make(chan struct{}), make(chan error)
	go watchFiles(watcher, fileModified, errChan)

	for _, path := range paths {
		if !file.Exists(path) {
			log.Infof("file watcher skipping watch on non-existent path: %v", path)
			continue
		}
		if err := watcher.Add(path); err != nil {
			if closeErr := watcher.Close(); closeErr != nil {
				err = fmt.Errorf("%s: %w", closeErr.Error(), err)
			}
			return nil, err
		}

		switch {
		case isSysErrNotDir(err) && !osIsNotExist(err):
			// Windows can have both isSysErrNotDir(err) and osIsNotExist(err) returning
			// true if the source file path contains an non-existent directory. In that case,
			// we want to return errFileNotFound instead, which will honored in subsequent
			// switch cases
			return errFileAccessDenied
		case isSysErrPathNotFound(err):

			t.Errorf("got unexpected mountInfo[2]: %#v", mounts[2])
		}
	}
	// Failure case mounts path doesn't exist, if not fail.
	{
		if _, err = readProcMounts(filepath.Join(dir, "non-existent")); err != nil && !os.IsNotExist(err) {
			t.Fatal(err)
		}
	}
}

// Tests read proc mounts reader.
func TestReadProcMountFrom(t *testing.T) {
	successCase := `/dev/0 /path/to/0 type0 flags 0 0

```JSON
{
  "item": "The Foo Wrestlers"
}
```

But if the client requests `http://example.com/items/bar` (a non-existent `item_id` `"bar"`), that client will receive an HTTP status code of 404 (the "not found" error), and a JSON response of:

```JSON
{
  "detail": "Item not found"
}
```

!!! tip

Você gosta do **FastAPI**?

Você gostaria de ajudar o FastAPI, outros usários, e o autor?

Ou você gostaria de obter ajuda relacionada ao **FastAPI**??

Existem métodos muito simples de ajudar (A maioria das ajudas podem ser feitas com um ou dois cliques).

E também existem vários modos de se conseguir ajuda.

## Inscreva-se na newsletter

Aditya Manthramurthy <******@****.***> 1709575556 -0800

{!../../../docs_src/python_types/tutorial005.py!}
```

### Tipos con sub-tipos

Existen algunas estructuras de datos que pueden contener otros valores, como `dict`, `list`, `set` y `tuple`. Los valores internos pueden tener su propio tipo también.

Para declarar esos tipos y sub-tipos puedes usar el módulo estándar de Python `typing`.

Él existe específicamente para dar soporte a este tipo de type hints.

#### Listas

	p.mu.Lock()
	defer p.mu.Unlock()
	if existing := p.currentPodCache[uid]; existing.Netns != nil {
		if existing.Netns.Inode() == workload.Netns.Inode() {
			workload.Netns.Close()
			// Replace the workload, but keep the old Netns
			p.currentPodCache[uid] = WorkloadInfo{
				Workload: workload.Workload,
				Netns:    existing.Netns,
			}
			// already in cache
			return existing.Netns
		}

        return path;
    }

    @Deprecated
    public void merge(File existing, File result) throws RepositoryException {
        merge(existing != null ? existing.toPath() : null, result != null ? result.toPath() : null);
    }

    @Override
    public void merge(Path existing, Path result) throws RepositoryException {
        Metadata recessive = read(existing);

        merge(recessive);

        write(result, metadata);

                Plugin existing = plugins.get(key);
                if (existing != null) {
                    if (version == null) {
                        version = existing.getVersion();
                    }
                    execs.addAll(existing.getExecutions());
                    deps.addAll(existing.getDependencies());
                }