from dataclasses import dataclass, field
from typing import List, Union

from fastapi import FastAPI


@dataclass
class Item:
    name: str
    price: float
    tags: List[str] = field(default_factory=list)
    description: Union[str, None] = None
    tax: Union[float, None] = None


app = FastAPI()


@app.get("/items/next", response_model=Item)
async def read_next_item():
    return {

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from fastapi import FastAPI
from pydantic import BaseModel

app = FastAPI()


class Item(BaseModel):
    name: str
    description: str | None = None
    price: float
    tax: float | None = None
    tags: set[str] = set()


@app.post("/items/", response_model=Item, tags=["items"])
async def create_item(item: Item):
    return item


@app.get("/items/", tags=["items"])
async def read_items():

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


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


class UserInDB(BaseModel):
    username: str
    hashed_password: str
    email: EmailStr

from typing import Optional

from fastapi import Depends, FastAPI
from pydantic import BaseModel, validator

app = FastAPI()


class ModelB(BaseModel):
    username: str


class ModelC(ModelB):
    password: str


class ModelA(BaseModel):
    name: str
    description: Optional[str] = None
    model_b: ModelB

    @validator("name")
    def lower_username(cls, name: str, values):

            options.template =
            '<div class="daterangepicker">' +
                '<div class="ranges"></div>' +
                '<div class="drp-calendar left">' +
                    '<div class="calendar-table"></div>' +
                    '<div class="calendar-time"></div>' +
                '</div>' +
                '<div class="drp-calendar right">' +
                    '<div class="calendar-table"></div>' +

import java.lang.reflect.Field;

/**
 * {@link Field}が見つからない場合にスローされる例外です。
 *
 * @author higa
 *
 */
public class FieldNotFoundRuntimeException extends ClRuntimeException {

    private static final long serialVersionUID = -2715036865146285893L;

    private final Class<?> targetClass;

    private final String fieldName;

    /**
     * {@link FieldNotFoundRuntimeException}を作成します。
     *

    return new IntValueWeigher();
  }

  static final class ConstantWeigher implements Weigher<Object, Object> {
    private final int constant;

    ConstantWeigher(int constant) {
      this.constant = constant;
    }

    @Override
    public int weigh(Object key, Object value) {
      return constant;
    }
  }

  static final class IntKeyWeigher implements Weigher<Integer, Object> {
    @Override

@SuppressWarnings("JUnit4ClassUsedInJUnit3")
public class ListRemoveAtIndexTester<E> extends AbstractListTester<E> {
  @ListFeature.Require(absent = SUPPORTS_REMOVE_WITH_INDEX)
  @CollectionSize.Require(absent = ZERO)
  public void testRemoveAtIndex_unsupported() {
    assertThrows(UnsupportedOperationException.class, () -> getList().remove(0));
    expectUnchanged();
  }

  // value represents the integer value of this priority class. This is the actual priority that pods
  // receive when they have the name of this class in their pod spec.
  optional int32 value = 2;

  // globalDefault specifies whether this PriorityClass should be considered as
  // the default priority for pods that do not have any priority class.
  // Only one PriorityClass can be marked as `globalDefault`. However, if more than