Para sobrescrevê-lo, importe o `RequestValidationError` e use-o com o `@app.exception_handler(RequestValidationError)` para decorar o manipulador de exceções.

{* ../../docs_src/handling_errors/tutorial004.py hl[2,14:16] *}

Se você for ao `/items/foo`, em vez de receber o JSON padrão com o erro:

```JSON
{
    "detail": [
        {
            "loc": [
                "path",
                "item_id"

    /** Permission to write file attributes */
    public static final int FILE_WRITE_ATTRIBUTES = 0x00000100; // 9
    /** Standard delete permission */
    public static final int DELETE = 0x00010000; // 16
    /** Permission to read the security descriptor */
    public static final int READ_CONTROL = 0x00020000; // 17
    /** Permission to write the discretionary access control list */

        byte[] buffer = new byte[10];

        // Act
        int bytesWritten = transPeekNamedPipe.writeSetupWireFormat(buffer, 0);

        // Assert
        assertEquals(4, bytesWritten);
        // -1 in 16-bit is 0xFFFF
        assertEquals((byte) 0xFF, buffer[2]);
        assertEquals((byte) 0xFF, buffer[3]);
    }

    @Test
    @DisplayName("Should verify all read methods return 0 with various parameters")

        this.file = file;
        this.openFlags = openFlags & 0xFFFF;
        this.access = openFlags >>> 16 & 0xFFFF;
        if (file.type != SmbFile.TYPE_NAMED_PIPE) {
            file.open(openFlags, access, SmbFile.ATTR_NORMAL, 0);
            this.openFlags &= ~(SmbFile.O_CREAT | SmbFile.O_TRUNC);
        } else {

🔐 ⚫️, 🗄 `RequestValidationError` & ⚙️ ⚫️ ⏮️ `@app.exception_handler(RequestValidationError)` 🎀 ⚠ 🐕‍🦺.

⚠ 🐕‍🦺 🔜 📨 `Request` & ⚠.

{* ../../docs_src/handling_errors/tutorial004.py hl[2,14:16] *}

🔜, 🚥 👆 🚶 `/items/foo`, ↩️ 💆‍♂ 🔢 🎻 ❌ ⏮️:

```JSON
{
    "detail": [
        {
            "loc": [
                "path",
                "item_id"
            ],

	_ = x[ErrInvalidBucketName-11]
	_ = x[ErrInvalidDigest-12]
	_ = x[ErrInvalidRange-13]
	_ = x[ErrInvalidRangePartNumber-14]
	_ = x[ErrInvalidCopyPartRange-15]
	_ = x[ErrInvalidCopyPartRangeSource-16]
	_ = x[ErrInvalidMaxKeys-17]
	_ = x[ErrInvalidEncodingMethod-18]
	_ = x[ErrInvalidMaxUploads-19]
	_ = x[ErrInvalidMaxParts-20]
	_ = x[ErrInvalidPartNumberMarker-21]
	_ = x[ErrInvalidPartNumber-22]

Обробник помилок отримує `Request` і саму помилку.

{* ../../docs_src/handling_errors/tutorial004.py hl[2,14:16] *}

Тепер, якщо Ви перейдете за посиланням `/items/foo`, замість того, щоб отримати стандартну JSON-помилку:

```JSON
{
    "detail": [
        {
            "loc": [
                "path",

ialiased;-webkit-text-size-adjust:none;font-size:16px;text-align:left;color:#292f33;padding:0px;margin:0px;line-height:16px;">東京都防災</a></strong>&nbsp;<img src="https://ea.twimg.com/email/self_serve/media/ico_verified-1407009642236.png" width="16" height="16" style="width:15px;height:15px;display:inline;margin:0;padding:0;display:block;-ms-interpolation-mode:bicubic;border:none;outline:none;display:inline-block;vertical-align:top;" class="inline-image" />&nbsp;<a href="https://twitter.com/i/redir...

	github.com/rjeczalik/notify v0.9.3 // indirect
	github.com/rs/xid v1.6.0 // indirect
	github.com/safchain/ethtool v0.5.10 // indirect
	github.com/segmentio/asm v1.2.0 // indirect
	github.com/shoenig/go-m1cpu v0.1.6 // indirect
	github.com/spiffe/go-spiffe/v2 v2.5.0 // indirect
	github.com/tidwall/gjson v1.18.0 // indirect
	github.com/tidwall/match v1.1.1 // indirect
	github.com/tidwall/pretty v1.2.1 // indirect

pkg debug/elf, const R_390_JMP_SLOT = 11
pkg debug/elf, const R_390_JMP_SLOT R_390
pkg debug/elf, const R_390_NONE = 0
pkg debug/elf, const R_390_NONE R_390
pkg debug/elf, const R_390_PC16 = 16
pkg debug/elf, const R_390_PC16 R_390
pkg debug/elf, const R_390_PC16DBL = 17
pkg debug/elf, const R_390_PC16DBL R_390
pkg debug/elf, const R_390_PC32 = 5
pkg debug/elf, const R_390_PC32 R_390