# Encoder – `jsonable_encoder`

# Encoders - `jsonable_encoder`

=== "Python 3.10+"

    ```Python hl_lines="4  21"
    {!> ../../../docs_src/encoder/tutorial001_py310.py!}
    ```

=== "Python 3.8+"

    ```Python hl_lines="5  22"
    {!> ../../../docs_src/encoder/tutorial001.py!}
    ```

In diesem Beispiel wird das Pydantic-Modell in ein `dict`, und das `datetime`-Objekt in ein `str` konvertiert.

// NewEncoder returns a new ascii85 stream encoder. Data written to
// the returned writer will be encoded and then written to w.
// Ascii85 encodings operate in 32-bit blocks; when finished
// writing, the caller must Close the returned encoder to flush any
// trailing partial block.
func NewEncoder(w io.Writer) io.WriteCloser { return &encoder{w: w} }

type encoder struct {
	err  error
	w    io.Writer

=== "Python 3.10+"

    ```Python hl_lines="4  21"
    {!> ../../../docs_src/encoder/tutorial001_py310.py!}
    ```

=== "Python 3.6+"

    ```Python hl_lines="5  22"
    {!> ../../../docs_src/encoder/tutorial001.py!}
    ```

В данном примере она преобразует Pydantic модель в `dict`, а `datetime` - в `str`.

=== "Python 3.10+"

    ```Python hl_lines="4  21"
    {!> ../../../docs_src/encoder/tutorial001_py310.py!}
    ```

=== "Python 3.8+"

    ```Python hl_lines="5  22"
    {!> ../../../docs_src/encoder/tutorial001.py!}
    ```

У цьому прикладі вона конвертує Pydantic model у `dict`, а `datetime` у `str`.

package profile

import (
	"errors"
	"sort"
	"strings"
)

func (p *Profile) decoder() []decoder {
	return profileDecoder
}

// preEncode populates the unexported fields to be used by encode
// (with suffix X) from the corresponding exported fields. The
// exported fields are cleared up to facilitate testing.
func (p *Profile) preEncode() {
	strings := make(map[string]int)
	addString(strings, "")

		return e, reedsolomon.ErrMaxShardNum
	}

	e = Erasure{
		dataBlocks:   dataBlocks,
		parityBlocks: parityBlocks,
		blockSize:    blockSize,
	}

	// Encoder when needed.
	var enc reedsolomon.Encoder
	var once sync.Once
	e.encoder = func() reedsolomon.Encoder {
		once.Do(func() {
			e, err := reedsolomon.New(dataBlocks, parityBlocks, reedsolomon.WithAutoGoroutines(int(e.ShardSize())))
			if err != nil {

	"unicode/utf8"
)

// A WordEncoder is an RFC 2047 encoded-word encoder.
type WordEncoder byte

const (
	// BEncoding represents Base64 encoding scheme as defined by RFC 2045.
	BEncoding = WordEncoder('b')
	// QEncoding represents the Q-encoding scheme as defined by RFC 2047.
	QEncoding = WordEncoder('q')
)

var (
	errInvalidWord = errors.New("mime: invalid RFC 2047 encoded-word")
)

同様に、このデータベースはPydanticモデル（属性を持つオブジェクト）を受け取らず、`dict`だけを受け取ります。

そのために`jsonable_encoder`を使用することができます。

Pydanticモデルのようなオブジェクトを受け取り、JSON互換版を返します:

```Python hl_lines="5 22"
{!../../../docs_src/encoder/tutorial001.py!}
```

この例では、Pydanticモデルを`dict`に、`datetime`を`str`に変換します。