Con **FastAPI** obtienes todas las funcionalidades de **Pydantic** (ya que FastAPI está basado en Pydantic para todo el manejo de datos):

* **Sin complicaciones**:
    * Sin micro-lenguaje de definición de esquemas nuevo que aprender.
    * Si conoces los tipos en Python sabes cómo usar Pydantic.

import jcifs.smb1.dcerpc.ndr.NdrException;
import jcifs.smb1.dcerpc.ndr.NdrObject;
import jcifs.smb1.dcerpc.ndr.NdrSmall;

/**
 * LSA RPC (Local Security Authority Remote Procedure Call) definitions.
 * Provides interface definitions and data structures for LSA RPC operations.
 */
public class lsarpc {

    /**
     * Private constructor to prevent instantiation of utility class.
     */
    private lsarpc() {

        globalParams.clear();
        tagQueue.clear();
    }

    /**
     * SAX event handler called when an XML start element is encountered.
     * Processes collection definitions and tracks the element hierarchy.
     *
     * @param uri the namespace URI, or empty string if none
     * @param localName the local name without prefix, or empty string if namespace processing is not performed

      InternetDomainName domain = InternetDomainName.from(inputName);

      /*
       * We would ordinarily use constants for the expected results, but
       * doing it by derivation allows us to reuse the test case definitions
       * used in other tests.
       */

      String expectedName = Ascii.toLowerCase(inputName);
      expectedName = expectedName.replaceAll("[\u3002\uFF0E\uFF61]", ".");

THE ACCOMPANYING PROGRAM IS PROVIDED UNDER THE TERMS OF THIS ECLIPSE PUBLIC
LICENSE ("AGREEMENT"). ANY USE, REPRODUCTION OR DISTRIBUTION OF THE PROGRAM
CONSTITUTES RECIPIENT'S ACCEPTANCE OF THIS AGREEMENT.

   1. DEFINITIONS

   "Contribution" means:

a) in the case of the initial Contributor, the initial code and documentation
distributed under this Agreement, and

      b) in the case of each subsequent Contributor:

import jcifs.dcerpc.ndr.NdrBuffer;
import jcifs.dcerpc.ndr.NdrException;
import jcifs.dcerpc.ndr.NdrObject;
import jcifs.dcerpc.ndr.NdrSmall;

/**
 * LSA RPC (Local Security Authority Remote Procedure Call) interface definitions.
 * This class provides data structures and constants for interacting with the
 * Windows Local Security Authority service via DCE/RPC protocol.
 */
@SuppressWarnings("all")
public class lsarpc {

    /**

{* ../../docs_src/python_types/tutorial001.py hl[2] *}

### Edítalo

Es un programa muy simple.

Pero ahora imagina que lo escribieras desde cero.

En algún momento habrías empezado la definición de la función, tenías los parámetros listos...

Pero luego tienes que llamar "ese método que convierte la primera letra a mayúscula".

¿Era `upper`? ¿Era `uppercase`? `first_uppercase`? `capitalize`?

        if (!(obj instanceof final SmbResourceLocatorImpl o)) {
            return false;
        }

        /*
         * If uncertain, pathNamesPossiblyEqual returns true.
         * Comparing canonical paths is definitive.
         */
        if (pathNamesPossiblyEqual(this.url.getPath(), o.url.getPath()) && getURLPath().equalsIgnoreCase(o.getURLPath())) {
            try {
                return getAddress().equals(o.getAddress());

{* ../../docs_src/python_types/tutorial001.py hl[2] *}


### Bewerk het

Dit is een heel eenvoudig programma.

Maar stel je nu voor dat je het vanaf nul zou moeten maken.

Op een gegeven moment zou je aan de definitie van de functie zijn begonnen, je had de parameters klaar...

Maar dan moet je “die methode die de eerste letter naar hoofdletters converteert” aanroepen.

Was het `upper`? Was het `uppercase`? `first_uppercase`? `capitalize`?

### Sub-dependencies { #sub-dependencies }

You can have multiple dependencies and [sub-dependencies](tutorial/dependencies/sub-dependencies.md){.internal-link target=_blank} requiring each other (as parameters of the function definitions), some of them might be created with `async def` and some with normal `def`. It would still work, and the ones created with normal `def` would be called on an external thread (from the threadpool) instead of being "awaited".