from fastapi import FastAPI

app = FastAPI()


@app.get("/app")
def read_main():
    return {"message": "Hello World from main app"}


subapi = FastAPI()


@subapi.get("/sub")
def read_sub():
    return {"message": "Hello World from sub API"}

package org.gradle.test

class GroovyClassWithFullyQualifiedNames extends org.gradle.test.sub.SubGroovyClass implements org.gradle.test.sub.SubJavaInterface, java.lang.Runnable {
    org.gradle.test.sub.SubJavaInterface getProp() {
        this
    }

    void run() {
    }

        == response2.json()
        == {"name": "Plumbus", "description": None, "sub": None}
    )


def test_create_item_with_sub():
    client = get_app_client()
    client_no = get_app_client(separate_input_output_schemas=False)
    data = {
        "name": "Plumbus",
        "sub": {"subname": "SubPlumbus", "sub_description": "Sub WTF"},
    }
    response = client.post("/items/", json=data)

	SUB	R0->28, R1           // 401e41e0
	SUB	R0@>28, R1           // 601e41e0
	SUB.S	R0<<28, R1           // 001e51e0
	SUB.S	R0>>28, R1           // 201e51e0
	SUB.S	R0->28, R1           // 401e51e0
	SUB.S	R0@>28, R1           // 601e51e0
	SUB	R0<<R1, R2, R3       // 103142e0
	SUB	R0>>R1, R2, R3       // 303142e0
	SUB	R0->R1, R2, R3       // 503142e0
	SUB	R0@>R1, R2, R3       // 703142e0

    captured_exception.exception = None
    try:
        client.get("/sub/items/")
    except Exception:
        pass

    assert captured_exception.exception is not None
    error_str = str(captured_exception.exception)
    assert "get_sub_item" in error_str
    assert "/sub/items/" in error_str


def test_subapp_websocket_validation_error_includes_endpoint_context():

            // Dokka Kotlin DSL reference goes into kotlin-dsl/
            task.from(extension.getKotlinDslReference().getRenderedDocumentation(), sub -> sub.into("kotlin-dsl"));

            // User manual goes into userguide/ (for historical reasons)
            task.from(extension.getUserManual().getRenderedDocumentation(), sub -> sub.into("userguide"));

					return errors.New("nbf: Expected number")
				}
				c.NotBefore, err = jsonparser.ParseInt(value)
				return err
			}
		case 's':
			if string(key) == "sub" {
				if dataType != jsonparser.String {
					return errors.New("sub: Expected string")
				}
				c.Subject, err = jsonparser.ParseString(value)
				return err
			}
		}
		// Ignore unknown fields
		return nil
	})
}

from fastapi.testclient import TestClient
from pydantic import BaseModel

app = FastAPI()


class SubModel(BaseModel):
    a: Optional[str] = "foo"


class Model(BaseModel):
    x: Optional[int] = None
    sub: SubModel


class ModelSubclass(Model):
    y: int
    z: int = 0
    w: Optional[int] = None


class ModelDefaults(BaseModel):
    w: Optional[str] = None
    x: Optional[str] = None

# Incluyendo WSGI - Flask, Django, otros { #including-wsgi-flask-django-others }

Puedes montar aplicaciones WSGI como viste con [Sub Aplicaciones - Mounts](sub-applications.md){.internal-link target=_blank}, [Detrás de un Proxy](behind-a-proxy.md){.internal-link target=_blank}.

Para eso, puedes usar `WSGIMiddleware` y usarlo para envolver tu aplicación WSGI, por ejemplo, Flask, Django, etc.

## Usando `WSGIMiddleware` { #using-wsgimiddleware }

    "paths": {
        "/sub": {
            "get": {
                "responses": {
                    "200": {
                        "description": "Successful Response",
                        "content": {"application/json": {"schema": {}}},
                    }
                },
                "summary": "Read Sub",
                "operationId": "read_sub_sub_get",
            }