+
+
+The Python SDK retrieves authentication information from the [credentials
+store](/engine/reference/commandline/login/#credentials-store) file and
+integrates with [credential
+helpers](https://github.com/docker/docker-credential-helpers){: target="_blank"
+class="_" }. It is possible to override these credentials, but that is out of
+scope for this Getting Started 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
+```
+
+
+
+
+
+```go
+package main
+
+import (
+ "io"
+ "os"
+ "encoding/json"
+ "encoding/base64"
+
+ "github.com/docker/docker/api/types"
+ "github.com/docker/docker/client"
+ "golang.org/x/net/context"
+)
+
+
+func main() {
+ ctx := context.Background()
+ cli, err := client.NewEnvClient()
+ if err != nil {
+ panic(err)
+ }
+
+ authConfig := types.AuthConfig{
+ Username: "username",
+ Password: "password",
+ }
+ encodedJSON, err := json.Marshal(authConfig)
+ if err != nil {
+ panic(err)
+ }
+ authStr := base64.URLEncoding.EncodeToString(encodedJSON)
+
+ out, err := cli.ImagePull(ctx, "alpine", types.ImagePullOptions{RegistryAuth:
+ authStr})
+ if err != nil {
+ panic(err)
+ }
+
+ defer out.Close()
+ io.Copy(os.Stdout, out)
+}
+```
+
+
+
+
+
+This example will leave the credentials in your shell's history, so consider
+this a naive implementation. The credentials are passed as a Base-64-encoded
+JSON structure.
+
+```bash
+$ JSON=$(echo '{"username": "string", "password": "string", "serveraddress": "string"}' | base64)
+
+$ curl --unix-socket /var/run/docker.sock \
+ -H "Content-Type: application/tar"
+ -X POST "http:/v1.24/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"}
+...
+```
+
+
+