// corresponding increase or decrease in Mantissa) such that:
//
// - No precision is lost
// - No fractional digits will be emitted
// - The exponent (or suffix) is as large as possible.
//
// The sign will be omitted unless the number is negative.
//
// Examples:
//
// - 1.5 will be serialized as "1500m"
// - 1.5Gi will be serialized as "1536Mi"
//

    ```

FastAPI will use this return type to:

* **Validate** the returned data.
    * If the data is invalid (e.g. you are missing a field), it means that *your* app code is broken, not returning what it should, and it will return a server error instead of returning incorrect data. This way you and your clients can be certain that they will receive the data and the data shape expected.

  // object in the same namespace as this pod.
  //
  // The template will be used to create a new ResourceClaim, which will
  // be bound to this pod. When this pod is deleted, the ResourceClaim
  // will also be deleted. The name of the ResourceClaim will be <pod
  // name>-<resource name>, where <resource name> is the
  // PodResourceClaim.Name. Pod validation will reject the pod if the

You will have inline errors for the data that you send:

<img src="/img/tutorial/generate-clients/image04.png">

The response object will also have autocompletion:

<img src="/img/tutorial/generate-clients/image05.png">

## FastAPI App with Tags

In many cases your FastAPI app will be bigger, and you will probably use tags to separate different groups of *path operations*.

// AggregationRule describes how to locate ClusterRoles to aggregate into the ClusterRole
message AggregationRule {
  // ClusterRoleSelectors holds a list of selectors which will be used to find ClusterRoles and create the rules.
  // If any of the selectors match, then the ClusterRole's permissions will be added
  // +optional
  repeated k8s.io.apimachinery.pkg.apis.meta.v1.LabelSelector clusterRoleSelectors = 1;
}

// AggregationRule describes how to locate ClusterRoles to aggregate into the ClusterRole
message AggregationRule {
  // ClusterRoleSelectors holds a list of selectors which will be used to find ClusterRoles and create the rules.
  // If any of the selectors match, then the ClusterRole's permissions will be added
  // +optional
  repeated k8s.io.apimachinery.pkg.apis.meta.v1.LabelSelector clusterRoleSelectors = 1;
}

### Create an `Enum` class

Import `Enum` and create a sub-class that inherits from `str` and from `Enum`.

By inheriting from `str` the API docs will be able to know that the values must be of type `string` and will be able to render correctly.

Then create class attributes with fixed values, which will be the available valid values:

```Python hl_lines="1  6-9"
{!../../../docs_src/path_params/tutorial005.py!}
```

!!! info

<div class="termy">

```console
$ python -m venv env
```

</div>

That will create a directory `./env/` with the Python binaries, and then you will be able to install packages for that local environment.

### Activate the environment

Activate the new environment with:

=== "Linux, macOS"

    <div class="termy">

If an exception implements this interface, Gradle will not display the `--stacktrace` option.

Another more targeted interface is `CompilationFailedIndicator`.
This interface is used to indicate that the exception is caused by a compilation failure. 

   * Response and normal event sequences will not be received.
   *
   * This event will only be received when a Cache is configured for the client.
   */
  open fun cacheHit(
    call: Call,
    response: Response,
  ) {
  }

  /**
   * Invoked when a response will be served from the network. The Response will be
   * available from normal event sequences.
   *