Für den Editor, mypy und andere Tools ist das kein Problem, da `UserIn` eine Unterklasse von `BaseUser` ist (Salopp: `UserIn` ist ein `BaseUser`). Es handelt sich um einen *gültigen* Typ, solange irgendetwas überreicht wird, das ein `BaseUser` ist.

### FastAPI Datenfilterung

from typing import Union

from fastapi import FastAPI, Header

app = FastAPI()


@app.get("/items/")
async def read_items(x_token: Union[list[str], None] = Header(default=None)):

app = FastAPI()


class CommonHeaders(BaseModel):
    model_config = {"extra": "forbid"}

    host: str
    save_data: bool
    if_modified_since: str | None = None
    traceparent: str | None = None
    x_tag: list[str] = []


@app.get("/items/")
async def read_items(headers: CommonHeaders = Header()):

import java.io.File;
import java.io.IOException;
import java.io.InputStream;
import java.io.Serializable;
import java.nio.charset.Charset;
import java.util.HashMap;
import java.util.List;
import java.util.Map;

import org.apache.commons.fileupload2.core.DiskFileItem;
import org.apache.commons.fileupload2.core.DiskFileItemFactory;
import org.apache.commons.fileupload2.core.FileUploadByteCountLimitException;

	"net/url"
	"sort"
	"strconv"
	"strings"

	xhttp "github.com/minio/minio/internal/http"

	"github.com/minio/minio/internal/auth"
)

// Whitelist resource list that will be used in query string for signature-V2 calculation.
//
// This list should be kept alphabetically sorted, do not hastily edit.
var resourceList = []string{
	"acl",
	"cors",
	"delete",
	"encryption",
	"legal-hold",
	"lifecycle",

from typing import Annotated, Union

from fastapi import FastAPI, Query

app = FastAPI()


@app.get("/items/")
async def read_items(q: Annotated[Union[list[str], None], Query()] = None):
    query_items = {"q": q}

 * governing permissions and limitations under the License.
 */
package org.codelibs.fess.es.config.cbean.bs;

import java.util.ArrayList;
import java.util.List;
import java.util.Map;

import org.codelibs.fess.es.config.allcommon.EsAbstractConditionBean;
import org.codelibs.fess.es.config.bsentity.dbmeta.BadWordDbm;
import org.codelibs.fess.es.config.cbean.BadWordCB;

 * governing permissions and limitations under the License.
 */
package org.codelibs.fess.es.config.cbean.bs;

import java.util.ArrayList;
import java.util.List;
import java.util.Map;

import org.codelibs.fess.es.config.allcommon.EsAbstractConditionBean;
import org.codelibs.fess.es.config.bsentity.dbmeta.BoostDocumentRuleDbm;

 * governing permissions and limitations under the License.
 */
package org.codelibs.fess.es.config.cbean.bs;

import java.util.ArrayList;
import java.util.List;
import java.util.Map;

import org.codelibs.fess.es.config.allcommon.EsAbstractConditionBean;
import org.codelibs.fess.es.config.bsentity.dbmeta.ElevateWordDbm;
import org.codelibs.fess.es.config.cbean.ElevateWordCB;

 * governing permissions and limitations under the License.
 */
package org.codelibs.fess.es.config.cbean.bs;

import java.util.ArrayList;
import java.util.List;
import java.util.Map;

import org.codelibs.fess.es.config.allcommon.EsAbstractConditionBean;
import org.codelibs.fess.es.config.bsentity.dbmeta.RequestHeaderDbm;
import org.codelibs.fess.es.config.cbean.RequestHeaderCB;