from pydantic._internal._utils import lenient_issubclass as lenient_issubclass
    from pydantic.fields import FieldInfo
    from pydantic.json_schema import GenerateJsonSchema as GenerateJsonSchema
    from pydantic.json_schema import JsonSchemaValue as JsonSchemaValue
    from pydantic_core import CoreSchema as CoreSchema
    from pydantic_core import PydanticUndefined, PydanticUndefinedType

import http.client
import inspect
import warnings
from typing import Any, Dict, List, Optional, Sequence, Set, Tuple, Type, Union, cast

from fastapi import routing
from fastapi._compat import (
    GenerateJsonSchema,
    JsonSchemaValue,
    ModelField,
    Undefined,
    get_compat_model_name_map,
    get_definitions,
    get_schema_from_model_field,
    lenient_issubclass,
)
from fastapi.datastructures import DefaultPlaceholder