public static final String NOTIFICATION_LOGIN = "notification.login";

    public static final String NOTIFICATION_SEARCH_TOP = "notification.search.top";

    public static final String NOTIFICATION_ADVANCE_SEARCH = "notification.advance.search";

    public static final String STORAGE_ENDPOINT = "storage.endpoint";

```Dockerfile
COPY ./requirements.txt /code/requirements.txt
```

Docker and other tools **build** these container images **incrementally**, adding **one layer on top of the other**, starting from the top of the `Dockerfile` and adding any files created by each of the instructions of the `Dockerfile`.

	// Check if backend is writable and supports O_DIRECT
	uuid := mustGetUUID()
	filePath := pathJoin(s.drivePath, minioMetaTmpDeletedBucket, ".writable-check-"+uuid+".tmp")

	// Create top level directories if they don't exist.
	// with mode 0o777 mkdir honors system umask.
	mkdirAll(pathutil.Dir(filePath), 0o777, s.drivePath) // don't need to fail here

```Python
def get_settings():
    return Settings()
```

we would create that object for each request, and we would be reading the `.env` file for each request. ⚠️

But as we are using the `@lru_cache` decorator on top, the `Settings` object will be created only once, the first time it's called. ✔️

//// tab | Python 3.9+

```Python hl_lines="1  11"
{!> ../../docs_src/settings/app03_an_py39/main.py!}
```

////

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<tbody>
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			name: "valid Kubernetes JSON",
			args: []string{"--filename", validKubernetesJSONFile},
			expectedRegexp: regexp.MustCompile(`^".*" is valid
$`),
			wantError: false,
		},
		{
			name:           "invalid top-level key",
			args:           []string{"--filename", unsupportedKeyFilename},
			expectedRegexp: regexp.MustCompile(`.*unknown field "unexpected_junk"`),
			wantError:      true,
		},
		{

## Execution of dependencies with `yield`

The sequence of execution is more or less like this diagram. Time flows from top to bottom. And each column is one of the parts interacting or executing code.

```mermaid
sequenceDiagram

participant client as Client
participant handler as Exception handler
participant dep as Dep with yield

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