{* ../../docs_src/stream_data/tutorial002_py310.py ln[23:27] hl[23] *}

### Simulate a File { #simulate-a-file }

In this example, we are simulating a file with `io.BytesIO`, which is a file-like object that lives only in memory, but lets us use the same interface.

For example, we can iterate over it to consume its contents, as we could with a file.

{* ../../docs_src/stream_data/tutorial002_py310.py ln[1:27] hl[3,12:13,25] *}

 *
 * @since 4.0.0
 */
@Experimental
public interface VersionParser extends Service {

    /**
     * Parses the specified version string, for example "1.0".
     *
     * @param version the version string to parse, must not be {@code null}
     * @return the parsed version, never {@code null}

      "targets": [
        {
          "datasource": {
            "type": "prometheus",
            "uid": "${DS_PROMETHEUS}"
          },
          "editorMode": "code",
          "exemplar": true,
          "expr": "sum by (bucket,range) (minio_bucket_objects_size_distribution{job=~\"$scrape_jobs\"})",
          "format": "time_series",
          "instant": false,
          "interval": "",

from docs_src.advanced_middleware.tutorial002_py310 import app


def test_middleware():
    client = TestClient(app, base_url="http://example.com")
    response = client.get("/")
    assert response.status_code == 200, response.text
    client = TestClient(app, base_url="http://subdomain.example.com")
    response = client.get("/")
    assert response.status_code == 200, response.text
    client = TestClient(app, base_url="http://invalidhost")

import javax.security.auth.callback.UnsupportedCallbackException
import okhttp3.OkHttpClient
import okhttp3.Request
import okhttp3.internal.SuppressSignatureCheck
import okhttp3.internal.platform.Platform

/**
 * Example of using a hardware key to perform client auth.
 * Prefer recent JDK builds, and results are temperamental to slight environment changes.
 * Different instructions and configuration may be required for other hardware devices.
 *

      Route(
        factory.newAddress(uriHost = "example.com", uriPort = 1003),
        Proxy.NO_PROXY,
        InetSocketAddress(ipv4Address, 1003),
      ).toString(),
    ).isEqualTo("example.com at 1.2.3.4:1003")
    assertThat(
      Route(
        factory.newAddress(uriHost = "example.com", uriPort = 1003),
        Proxy(Proxy.Type.HTTP, InetSocketAddress.createUnresolved("proxy.example.com", 1003)),

You can use, for example:

* `int`
* `float`
* `bool`
* `bytes`

{* ../../docs_src/python_types/tutorial005_py310.py hl[1] *}

### `typing` module { #typing-module }

For example, there's an official [Python Image](https://hub.docker.com/_/python).

And there are many other images for different things like databases, for example for:

* [PostgreSQL](https://hub.docker.com/_/postgres)
* [MySQL](https://hub.docker.com/_/mysql)
* [MongoDB](https://hub.docker.com/_/mongo)

Pero si por alguna razón tus clientes dependen del comportamiento anterior, puedes volver a él sobrescribiendo el método `make_not_authenticated_error` en tus clases de seguridad.

Por ejemplo, puedes crear una subclase de `HTTPBearer` que devuelva un error `403 Forbidden` en lugar del `401 Unauthorized` por defecto:

{* ../../docs_src/authentication_error_status_code/tutorial001_an_py310.py hl[9:13] *}

        // Test registerSmbURLHandler when java.protocol.handler.pkgs does not contain "jcifs"
        System.setProperty("java.protocol.handler.pkgs", "com.example");
        SingletonContext.registerSmbURLHandler();
        assertEquals("com.example|jcifs", System.getProperty("java.protocol.handler.pkgs"));
    }

    @Test
    void testRegisterSmbURLHandlerWhenPkgsAlreadyContainsJcifs() {