---

## Install FastAPI

The first step is to install FastAPI.

Make sure you create a [virtual environment](../virtual-environments.md){.internal-link target=_blank}, activate it, and then **install FastAPI**:

<div class="termy">

```console
$ pip install "fastapi[standard]"

---> 100%
```

</div>

/// note

Aktivieren Sie die neue Umgebung mit:

//// tab | Linux, macOS

<div class="termy">

```console
$ source ./env/bin/activate
```

</div>

////

//// tab | Windows PowerShell

<div class="termy">

```console
$ .\env\Scripts\Activate.ps1
```

</div>

////

//// tab | Windows Bash

	"io"
	"strings"

	metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"

	binversion "istio.io/istio/operator/version"
)

var NeverMatch = &metav1.LabelSelector{
	MatchLabels: map[string]string{
		"istio.io/deactivated": "never-match",
	},
}

var ManifestsFlagHelpStr = `Specify a path to a directory of charts and profiles
(e.g. ~/Downloads/istio-` + binversion.OperatorVersionString + `/manifests).`

     */
    @Nonnull
    Optional<Boolean> updateSnapshots();

    /**
     * Returns the list of profiles to activate.
     *
     * @return an {@link Optional} containing the list of profile names to activate, or empty if not specified
     */
    @Nonnull
    Optional<List<String>> activatedProfiles();

    /**
     * Indicates whether Maven should suppress SNAPSHOT updates.

* `/items/private/`
* `/users/{user_id}/activate`
* `/items/pro/`

そして、依存関係とサブ依存関係だけで、それぞれに異なるパーミッション要件を追加することができます:

```mermaid
graph TB

current_user(["current_user"])
active_user(["active_user"])
admin_user(["admin_user"])
paying_user(["paying_user"])

public["/items/public/"]
private["/items/private/"]
activate_user["/users/{user_id}/activate"]
pro_items["/items/pro/"]

Make sure you create a [virtual environment](../virtual-environments.md){.internal-link target=_blank}, activate it, and then install it, for example:

```console
$ pip install python-multipart
```

///

/// note

This is supported since FastAPI version `0.113.0`. 🤓

///

 *
 */
class JdkVersionProfileActivatorTest extends AbstractProfileActivatorTest<JdkVersionProfileActivator> {

    @Override
    @BeforeEach
    void setUp() throws Exception {
        activator = new JdkVersionProfileActivator();
    }

    private Profile newProfile(String jdkVersion) {
        Activation a = Activation.newBuilder().jdk(jdkVersion).build();

For example, let's say you have 4 API endpoints (*path operations*):

* `/items/public/`
* `/items/private/`
* `/users/{user_id}/activate`
* `/items/pro/`

then you could add different permission requirements for each of them just with dependencies and sub-dependencies:

```mermaid
graph TB

current_user(["current_user"])

## Install dependencies

Make sure you create a [virtual environment](../virtual-environments.md){.internal-link target=_blank}, activate it, and install `jinja2`:

<div class="termy">

```console
$ pip install jinja2

---> 100%
```

</div>

## Using `Jinja2Templates`

* Import `Jinja2Templates`.

### 🔓 🌐

🔓 🆕 🌐 ⏮️:

//// tab | 💾, 🇸🇻

<div class="termy">

```console
$ source ./env/bin/activate
```

</div>

////

//// tab | 🚪 📋

<div class="termy">

```console
$ .\env\Scripts\Activate.ps1
```

</div>

////

//// tab | 🚪 🎉