{* ../../docs_src/events/tutorial003_py310.py hl[1,13] *}

A **context manager** in Python is something that you can use in a `with` statement, for example, `open()` can be used as a context manager:

```Python
with open("file.txt") as file:
    file.read()
```

In recent versions of Python, there's also an **async context manager**. You would use it with `async with`:

```Python

            "uid": "${DS_PROMETHEUS}"
          },
          "exemplar": true,
          "expr": "minio_node_drive_used_bytes{job=~\"$scrape_jobs\",server=\"$server\"}",
          "interval": "",
          "legendFormat": "Used [{{drive}}]",
          "refId": "B"
        },
        {
          "datasource": {
            "type": "prometheus",
            "uid": "${DS_PROMETHEUS}"
          },
          "exemplar": true,

            // Perform the renewal
            boolean renewed = wrapper.renewCredentials("locationHint", null);

            // Verify that NtlmAuthenticator was used and credentials were updated
            assertTrue(renewed, "renewCredentials should return true when NtlmAuthenticator provides new credentials");

    }

    @Test
    public void testReadString() throws IOException, PACDecodingException {
        // total=4, unused=1, used=2, string="AB"
        byte[] data = new byte[] { 0x04, 0x00, 0x00, 0x00, // total
                0x01, 0x00, 0x00, 0x00, // unused
                0x02, 0x00, 0x00, 0x00, // used
                0x00, 0x00, // unused char
                0x41, 0x00, // 'A'
                0x42, 0x00 // 'B'
        };

if [[ "${TFCI_MACOS_BAZEL_TEST_DIR_ENABLE}" == 1 ]]; then
  mkdir -p "${TFCI_MACOS_BAZEL_TEST_DIR_PATH}"
  export TEST_TMPDIR="${TFCI_MACOS_BAZEL_TEST_DIR_PATH}"
fi

# "TFCI_MACOS_INSTALL_BAZELISK_ENABLE" is used to decide if we need to install
# Bazelisk manually. We enable this for macOS x86 builds as those VMs do not
# have Bazelisk pre-installed. "TFCI_MACOS_INSTALL_BAZELISK_URL" contains the

     * Demonstrates that null InputStream is handled correctly.
     */
    @Test
    public void testResourceLoading_withMissingResource() throws Exception {
        // Test the pattern used in getDefaultMappings/getDefaultIndexSettings
        // with a non-existent resource
        try {
            try (final InputStream is = getClass().getClassLoader().getResourceAsStream("non/existent/resource.json")) {

     */
    private int httpStatusCode;

    /**
     * The content cache that stores the response content.
     */
    private ContentCache contentCache;

    /**
     * The encoding used for the response content.
     */
    private String encoding;

    /**
     * The exception that occurred while accessing the content, if any.
     */
    private Exception contentException;

    /**

 *
 * HTTP requests that share the same [Address] may also share the same [Connection].
 */
class Address(
  uriHost: String,
  uriPort: Int,
  /** Returns the service that will be used to resolve IP addresses for hostnames. */
  @get:JvmName("dns") val dns: Dns,
  /** Returns the socket factory for new connections. */
  @get:JvmName("socketFactory") val socketFactory: SocketFactory,

                    + " ((3\\.)? The name of .+ may not be used to endorse or promote products\n"
                    + "    derived from this software without specific prior written permission\\.|\n"
                    + "  (3\\.)? Neither the name of .+ nor the names of its\n"
                    + "     contributors may be used to endorse or promote products derived from\n"

 * governing permissions and limitations under the License.
 */
package org.codelibs.fess.app.web.admin.wizard;

/**
 * Form class for starting crawling operations in the admin wizard.
 *
 * This form is used to collect user input and parameters needed to initiate
 * crawling operations through the administrative interface wizard workflow.
 * It serves as a data transfer object between the web layer and the crawling
 * service components.