full_name = user_dict["full_name"],
    hashed_password = hashed_password,
)
```

/// warning

The supporting additional functions `fake_password_hasher` and `fake_save_user` are just to demo a possible flow of the data, but they of course are not providing any real security.

///

## Reduce duplication { #reduce-duplication }

Reducing code duplication is one of the core ideas in **FastAPI**.

# Démarrage

Le fichier **FastAPI** le plus simple possible pourrait ressembler à cela  :

{* ../../docs_src/first_steps/tutorial001.py *}

Copiez ce code dans un fichier nommé `main.py`.

Démarrez le serveur :

<div class="termy">

```console
$ uvicorn main:app --reload

<span style="color: green;">INFO</span>:     Uvicorn running on http://127.0.0.1:8000 (Press CTRL+C to quit)

## **FastAPI** plug-ins { #fastapi-plug-ins }

Integrations and "plug-ins" can be built using the **Dependency Injection** system. But in fact, there is actually **no need to create "plug-ins"**, as by using dependencies it's possible to declare an infinite number of integrations and interactions that become available to your *path operation functions*.

The first one will always be used since the path matches first.

## Predefined values { #predefined-values }

If you have a *path operation* that receives a *path parameter*, but you want the possible valid *path parameter* values to be predefined, you can use a standard Python <abbr title="Enumeration">`Enum`</abbr>.

### Create an `Enum` class { #create-an-enum-class }

	// We have value receiver so we already have a copy.
	m.o = m.o.shallowClone()
	return m
}

// fileInfoVersions converts the metadata to FileInfoVersions where possible.
// Metadata that cannot be decoded is skipped.
func (m *metaCacheEntriesSorted) fileInfoVersions(bucket, prefix, delimiter, afterV string) (versions []ObjectInfo) {
	versions = make([]ObjectInfo, 0, m.len())

    }

    @Test
    @DisplayName("Should handle all file change notifications")
    void testAllFileChangeNotifications() {
        // Given - all possible filters
        int allFilters = Smb2ChangeNotifyRequest.FILE_NOTIFY_CHANGE_FILE_NAME | Smb2ChangeNotifyRequest.FILE_NOTIFY_CHANGE_DIR_NAME

### Background Tasks and Dependencies with `yield`, Technical Details { #background-tasks-and-dependencies-with-yield-technical-details }

Before FastAPI 0.106.0, raising exceptions after `yield` was not possible, the exit code in dependencies with `yield` was executed *after* the response was sent, so [Exception Handlers](../handling-errors.md#install-custom-exception-handlers){.internal-link target=_blank} would have already run.

		panic("invalid format")
	}

	// Update checksum.
	// This field is special in that it is terminated by a NULL then space.
	var f formatter
	field := b.toV7().chksum()
	chksum, _ := b.computeChecksum() // Possible values are 256..128776
	f.formatOctal(field[:7], chksum) // Never fails since 128776 < 262143
	field[7] = ' '
}

// computeChecksum computes the checksum for the header block.

    echo "Look at the instructions for ':api_compatibility_test -- --update_goldens=True'"
}

# See b/279852433 (internal).
# TODO(b/279852433) Replace deps(//tensorflow/...) with deps(//...)
@test "Verify that it's possible to query every TensorFlow target without BUILD errors" {
    bazel query "deps(//tensorflow/... -attr(tags, 'manual', //tensorflow/...))" > /dev/null
}

teardown_file() {
    bazel shutdown

Tout le framework a été conçu pour être facile et intuitif d'utilisation, toutes les décisions de design ont été testées sur de nombreux éditeurs avant même de commencer le développement final afin d'assurer la meilleure expérience de développement possible.