- label: I already checked if it is not related to FastAPI but to [Pydantic](https://github.com/pydantic/pydantic).
          required: true
        - label: I already checked if it is not related to FastAPI but to [Swagger UI](https://github.com/swagger-api/swagger-ui).
          required: true
        - label: I already checked if it is not related to FastAPI but to [ReDoc](https://github.com/Redocly/redoc).
          required: true

		t.Errorf("Should found two users's name in 1, 2, but got %v", len(users1))
	}

	DB.Scopes(NameIn1And2, NameIn2And3).Find(&users2)
	if len(users2) != 1 {
		t.Errorf("Should found one user's name is 2, but got %v", len(users2))
	}

	DB.Scopes(NameIn([]string{users[0].Name, users[2].Name})).Find(&users3)
	if len(users3) != 2 {
		t.Errorf("Should found two users's name in 1, 3, but got %v", len(users3))
	}

    # to be read from files and other types, but I'm not even sure it's a good idea
    # to support it as a first class "feature"
    assert is_bytes_sequence_annotation(Union[List[str], List[bytes]])


def test_is_uploadfile_sequence_annotation():
    # For coverage
    # TODO: in theory this would allow declaring types that could be lists of UploadFile
    # and other types, but I'm not even sure it's a good idea to support it as a first

	if evt.Action != TransitionAction {
		t.Fatalf("Expected action: %s but got %s", TransitionAction, evt.Action)
	}
	if evt.StorageClass != "TIER-1" {
		t.Fatalf("Expected TIER-1 but got %s", evt.StorageClass)
	}

	evt = lc.eval(obj2, now)
	if evt.Action != TransitionVersionAction {
		t.Fatalf("Expected action: %s but got %s", TransitionVersionAction, evt.Action)
	}
	if evt.StorageClass != "TIER-2" {

## List fields with type parameter

But Python has a specific way to declare lists with internal types, or "type parameters":

### Import typing's `List`

In Python 3.9 and above you can use the standard `list` to declare these type annotations as we'll see below. 💡

But in Python versions before 3.9 (3.6 and above), you first need to import `List` from standard Python's `typing` module:

	}

	keys := store.List()
	if len(keys) != 1 {
		t.Fatalf("expected len(keys)=1, but found %d", len(keys))
	}

	key := keys[0]
	if !key.Compress {
		t.Fatal("expected the item to be compressed")
	}
	if key.ItemCount != 10 {
		t.Fatalf("expected itemcount=10 but found %v", key.ItemCount)
	}

	resultItems, err := store.GetMultiple(key)
	if err != nil {

		if rec.Code != testCase.expectedRespStatus {
			t.Errorf("Test %d: %s: Expected the response status to be `%d`, but instead found `%d`", i+1, instanceType, testCase.expectedRespStatus, rec.Code)
		}
		if testCase.shouldPass && !bytes.Equal(testCase.lifecycleResponse, rec.Body.Bytes()) {
			t.Errorf("Test %d: %s: Expected the response to be `%s`, but instead found `%s`", i+1, instanceType, string(testCase.lifecycleResponse), rec.Body.String())
		}

Just functions that look the same as the *path operation functions*.

But still, it is very powerful, and allows you to declare arbitrarily deeply nested dependency "graphs" (trees).

/// tip

All this might not seem as useful with these simple examples.

But you will see how useful it is in the chapters about **security**.

And you will also see the amounts of code it will save you.

For example, Google login uses OpenID Connect (which underneath uses OAuth2).

But Facebook login doesn't support OpenID Connect. It has its own flavor of OAuth2.

### OpenID (not "OpenID Connect")

There was also an "OpenID" specification. That tried to solve the same thing as **OpenID Connect**, but was not based on OAuth2.

So, it was a complete additional system.

It is not very popular or used nowadays.

///

```Python hl_lines="7"
{!> ../../docs_src/request_files/tutorial001.py!}
```

////

/// info

`File` is a class that inherits directly from `Form`.

But remember that when you import `Query`, `Path`, `File` and others from `fastapi`, those are actually functions that return special classes.

///

/// tip