from fastapi import FastAPI
from pydantic import BaseModel, EmailStr

app = FastAPI()


class UserIn(BaseModel):
    username: str
    password: str
    email: EmailStr
    full_name: str | None = None


# Don't do this in production!
@app.post("/user/")
async def create_user(user: UserIn) -> UserIn:

          return; // Okay to say Foo is <?>
        }
        // Can't map from a raw class to anything other than itself or a wildcard.
        // You can't say "assuming String is Integer".
        // And we don't support "assuming String is T"; user has to say "assuming T is String".
        throw new IllegalArgumentException("No type mapping from " + fromClass + " to " + to);
      }
    }.visit(from);
  }

  /**

    return super.containsAll(c);
  }

  @Override
  public boolean isEmpty() {
    assertTrue(Thread.holdsLock(mutex));
    return super.isEmpty();
  }

  /*
   * We don't assert that the lock is held during calls to iterator(), stream(), and spliterator:
   * `Synchronized` doesn't guarantee that it will hold the mutex for those calls because callers
   * are responsible for taking the mutex themselves:

import org.apache.maven.impl.SettingsUtilsV4;

/**
 * Several convenience methods to handle settings
 *
 */
public final class SettingsUtils {

    private SettingsUtils() {
        // don't allow construction.
    }

    /**
     * @param dominant
     * @param recessive
     * @param recessiveSourceLevel
     */

            if (path.isAbsolute()) {
                // path is already absolute, we're done
            } else if (path.getPath().startsWith(File.separator)) {
                // drive-relative Windows path, don't align with base dir but with drive root
                result = path.getAbsoluteFile();
            } else {
                // an ordinary relative path, align with base dir

    internal var onlyIfCached: Boolean = false
    internal var noTransform: Boolean = false
    internal var immutable: Boolean = false

    /** Don't accept an unvalidated cached response. */
    fun noCache() = commonNoCache()

    /** Don't store the server's response in any cache. */
    fun noStore() = commonNoStore()

    /**

// path unmodified.
//
// See https://msdn.microsoft.com/en-us/library/windows/desktop/aa365247(v=vs.85).aspx#maxpath
func fixLongPath(path string) string {
	// Do nothing (and don't allocate) if the path is "short".
	// Empirically (at least on the Windows Server 2013 builder),
	// the kernel is arbitrarily okay with < 248 bytes. That
	// matches what the docs above say:

This is useful if you don't know the valid field/attribute names (that would be needed for a Pydantic model) beforehand.

In this case, you can use `typing.Dict` (or just `dict` in Python 3.9 and above):

{* ../../docs_src/extra_models/tutorial005_py39.py hl[6] *}

## Recap { #recap }

Use multiple Pydantic models and inherit freely for each case.

                .longOpt("strict-checksums")
                .desc("Fail the build if checksums don't match")
                .build());
        options.addOption(Option.builder(Character.toString(CHECKSUM_WARNING_POLICY))
                .longOpt("lax-checksums")
                .desc("Warn if checksums don't match")
                .build());
        options.addOption(Option.builder(Character.toString(ALTERNATE_USER_SETTINGS))

        applyRule<DependencyRemovalByNameRule>(libs.awsS3Core, setOf("jackson-dataformat-cbor"))
        applyRule<DependencyRemovalByGroupRule>(libs.jgit, setOf("com.googlecode.javaewah"))

        // We don't need the extra annotations provided by j2objc
        applyRule<DependencyRemovalByNameRule>(libs.googleHttpClient, setOf("j2objc-annotations"))

        // Read capabilities declared in capabilities.json