to:

```Python
    first_name: str, last_name: str
```

That's it.

Those are the "type hints":

{* ../../docs_src/python_types/tutorial002_py39.py hl[1] *}

That is not the same as declaring default values like would be with:

```Python
    first_name="john", last_name="doe"
```

It's a different thing.

We are using colons (`:`), not equals (`=`).

그러면 해당 파이썬 프로그램을 다음과 같이 호출할 수 있습니다:

//// tab | Linux, macOS, Windows Bash

<div class="termy">

```console
// Here we don't set the env var yet
$ python main.py

// As we didn't set the env var, we get the default value

Hello World from Python

// But if we create an environment variable first
$ export MY_NAME="Wade Wilson"

// And then call the program again
$ python main.py

                size = sfd.getInitialSize();
                resumeKey = rkresp.getResumeKey();

                // start with some reasonably safe defaults, the server will till us if it does not like it
                // can we resume this if we loose the file descriptor?

                int maxChunks = 256;
                int maxChunkSize = 1024 * 1024;

import jakarta.annotation.Resource;

/**
 * Admin action for Kuromoji dictionary management.
 *
 */
public class AdminDictKuromojiAction extends FessAdminAction {

    /**
     * Default constructor.
     */
    public AdminDictKuromojiAction() {
        super();
    }

    /** The role for this action. */
    public static final String ROLE = "admin-dict";

        } catch (final UnknownHostException uhe) {}

        if (ro == null || ro.length() == 0) {

            /* No resolveOrder has been specified, use the
             * default which is LMHOSTS,WINS,BCAST,DNS or just
             * LMHOSTS,BCAST,DNS if jcifs.smb1.netbios.wins has not
             * been specified.
             */

            if (nbns == null) {

              <include>org.apache.maven.usability</include>
            </includes>
            <!-- allowed non-binary backwards compatible changes -->
            <excludes>
              <!-- START default constructor on Plexus/JSR 330 components -->
              <exclude>org.apache.maven.lifecycle.DefaultLifecycleExecutor#DefaultLifecycleExecutor()</exclude>

                .build());
        options.addOption(Option.builder(STRICT_ARTIFACT_DESCRIPTOR_POLICY)
                .longOpt("strict-artifact-descriptor-policy")
                .hasArg()
                .desc("Defines 'strict' artifact descriptor policy. Supported values are 'true', 'false' (default).")
                .build());

    }

    // -----------------------------------------------------------------------------------------------
    // Tests which exercise the lifecycle executor when it is dealing with default lifecycle phases.
    // -----------------------------------------------------------------------------------------------

    @Test

        // per bouncycastle
        // <li>1: K(i) := PRF( KI, [i]_2 || Label || 0x00 || Context || [L]_2 ) with the counter at the very beginning
        // of the fixedInputData (The default implementation has this format)</li>
        // with the parameters
        // <li>1. KDFCounterParameters(ki, null, "Label || 0x00 || Context || [L]_2]", 8);

        // all fixed inputs go into the suffix:

    //                                                                         Constructor
    //                                                                         ===========
    /**
     * Default constructor.
     */
    public ApiAdminKeymatchAction() {
        super();
    }

    // ===================================================================================