if err != nil {
		panic(err)
	}
	authStr := base64.URLEncoding.EncodeToString(encodedJSON)

	out, err := cli.ImagePull(ctx, "alpine", image.PullOptions{RegistryAuth: authStr})
	if err != nil {
		panic(err)
	}

	defer out.Close()
	io.Copy(os.Stdout, out)
}
```

{{< /tab >}}
{{< tab name="Python" >}}

The Python SDK retrieves authentication information from the [credentials
store](/reference/cli/docker/login/#credential-stores) file and
integrates with [credential
helpers](https://github.com/docker/docker-credential-helpers). It's possible to override these credentials, but that's out of
scope for this example guide. After using `docker login`, the Python SDK
uses these credentials automatically.

```python
import docker
client = docker.from_env()
image = client.images.pull("alpine")
print(image.id)
```

{{< /tab >}}
{{< tab name="HTTP" >}}

This example leaves the credentials in your shell's history, so consider
this a naive implementation. The credentials are passed as a Base-64-encoded
JSON structure.

```console
$ JSON=$(echo '{"username": "string", "password": "string", "serveraddress": "string"}' | base64)

$ curl --unix-socket /var/run/docker.sock \
  -H "Content-Type: application/tar"
  -X POST "http://localhost/v{{% param "latest_engine_api_version" %}}/images/create?fromImage=alpine"
  -H "X-Registry-Auth"
  -d "$JSON"
{"status":"Pulling from library/alpine","id":"3.1"}
{"status":"Pulling fs layer","progressDetail":{},"id":"8f13703509f7"}
{"status":"Downloading","progressDetail":{"current":32768,"total":2244027},"progress":"[\u003e                                                  ] 32.77 kB/2.244 MB","id":"8f13703509f7"}
...
```

{{< /tab >}}
{{< /tabs >}}

## Commit a container

Commit a container to create an image from its contents:

{{< tabs group="lang" >}}
{{< tab name="Go" >}}

```go
package main

import (
	"context"
	"fmt"

	"github.com/docker/docker/api/types/container"
	"github.com/docker/docker/client"
)

func main() {
	ctx := context.Background()
	cli, err := client.NewClientWithOpts(client.FromEnv, client.WithAPIVersionNegotiation())
	if err != nil {
		panic(err)
	}
	defer cli.Close()

	createResp, err := cli.ContainerCreate(ctx, &container.Config{
		Image: "alpine",
		Cmd:   []string{"touch", "/helloworld"},
	}, nil, nil, nil, "")
	if err != nil {
		panic(err)
	}

	if err := cli.ContainerStart(ctx, createResp.ID, container.StartOptions{}); err != nil {
		panic(err)
	}

	statusCh, errCh := cli.ContainerWait(ctx, createResp.ID, container.WaitConditionNotRunning)
	select {
	case err := <-errCh:
		if err != nil {
			panic(err)
		}
	case <-statusCh:
	}

	commitResp, err := cli.ContainerCommit(ctx, createResp.ID, container.CommitOptions{Reference: "helloworld"})
	if err != nil {
		panic(err)
	}

	fmt.Println(commitResp.ID)
}
```

{{< /tab >}}
{{< tab name="Python" >}}

```python
import docker
client = docker.from_env()
container = client.containers.run("alpine", ["touch", "/helloworld"], detach=True)
container.wait()
image = container.commit("helloworld")
print(image.id)
```

{{< /tab >}}
{{< tab name="HTTP" >}}

```console
$ docker run -d alpine touch /helloworld
0888269a9d584f0fa8fc96b3c0d8d57969ceea3a64acf47cd34eebb4744dbc52
$ curl --unix-socket /var/run/docker.sock\
  -X POST "http://localhost/v{{% param "latest_engine_api_version" %}}/commit?container=0888269a9d&repo=helloworld"
{"Id":"sha256:6c86a5cd4b87f2771648ce619e319f3e508394b5bfc2cdbd2d60f59d52acda6c"}
```

{{< /tab >}}
{{< /tabs >}}