String keyToRemove = map.keySet().iterator().next();
      if (supportsRemove) {
        int initialSize = map.size();
        // var oldValue = map.get(keyToRemove);
        map.remove(keyToRemove);
        // This line doesn't hold - see the Javadoc comments above.
        // assertEquals(expectedValue, oldValue);
        assertFalse(map.containsKey(keyToRemove));
        assertEquals(initialSize - 1, map.size());
      } else {

```

/// tip

There are several `__init__.py` files: one in each directory or subdirectory.

This is what allows importing code from one file into another.

For example, in `app/main.py` you could have a line like:

```
from app.routers import items
```

///

* The `app` directory contains everything. And it has an empty file `app/__init__.py`, so it is a "Python package" (a collection of "Python modules"): `app`.

 *
 * <p>Note that this specifically does <strong>not</strong> represent the value of the MIME {@code
 * Content-Type} header and as such has no support for header-specific considerations such as line
 * folding and comments.
 *
 * <p>For media types that take a charset the predefined constants default to UTF-8 and have a
 * "_UTF_8" suffix. To get a version without a character set, use {@link #withoutParameters}.
 *

And there are extra tools/scripts in place to handle translations in `./scripts/docs.py`.

/// tip

You don't need to see the code in `./scripts/docs.py`, you just use it in the command line.

///

All the documentation is in Markdown format in the directory `./docs/en/`.

Many of the tutorials have blocks of code.

But, sadly, you get nothing useful:

<img src="/img/python-types/image01.png">

### Add types { #add-types }

Let's modify a single line from the previous version.

We will change exactly this fragment, the parameters of the function, from:

```Python
    first_name, last_name
```

to:

```Python
    first_name: str, last_name: str

	}
}

var (
	errDecommissionAlreadyRunning = errors.New("decommission is already in progress")
	errDecommissionComplete       = errors.New("decommission is complete, please remove the servers from command-line")
	errDecommissionNotStarted     = errors.New("decommission is not in progress")
)

func (p *poolMeta) Decommission(idx int, pi poolSpaceInfo) error {

.Values.svcaccts }} echo {{ tpl .accessKey $global }} > $MINIO_ACCESSKEY_SECRETKEY_TMP {{- if .existingSecret }} cat /config/secrets-svc/{{ tpl .existingSecret $global }}/{{ tpl .existingSecretKey $global }} >> $MINIO_ACCESSKEY_SECRETKEY_TMP # Add a new line if it doesn't exist sed -i '$a\' $MINIO_ACCESSKEY_SECRETKEY_TMP {{ else }} echo {{ .secretKey }} >> $MINIO_ACCESSKEY_SECRETKEY_TMP {{- end }} {{- if $svc.policy}} createSvcacct {{ .user }} svc_policy_{{ $idx }} {{ else }} createSvcacct {{ .user }}...

.Values.svcaccts }} echo {{ tpl .accessKey $global }} > $MINIO_ACCESSKEY_SECRETKEY_TMP {{- if .existingSecret }} cat /config/secrets-svc/{{ tpl .existingSecret $global }}/{{ tpl .existingSecretKey $global }} >> $MINIO_ACCESSKEY_SECRETKEY_TMP # Add a new line if it doesn't exist sed -i '$a\' $MINIO_ACCESSKEY_SECRETKEY_TMP {{ else }} echo {{ .secretKey }} >> $MINIO_ACCESSKEY_SECRETKEY_TMP {{- end }} {{- if $svc.policy}} createSvcacct {{ .user }} svc_policy_{{ $idx }} {{ else }} createSvcacct {{ .user }}...

.Values.svcaccts }} echo {{ tpl .accessKey $global }} > $MINIO_ACCESSKEY_SECRETKEY_TMP {{- if .existingSecret }} cat /config/secrets-svc/{{ tpl .existingSecret $global }}/{{ tpl .existingSecretKey $global }} >> $MINIO_ACCESSKEY_SECRETKEY_TMP # Add a new line if it doesn't exist sed -i '$a\' $MINIO_ACCESSKEY_SECRETKEY_TMP {{ else }} echo {{ .secretKey }} >> $MINIO_ACCESSKEY_SECRETKEY_TMP {{- end }} {{- if $svc.policy}} createSvcacct {{ .user }} svc_policy_{{ $idx }} {{ else }} createSvcacct {{ .user }}...

.Values.svcaccts }} echo {{ tpl .accessKey $global }} > $MINIO_ACCESSKEY_SECRETKEY_TMP {{- if .existingSecret }} cat /config/secrets/{{ tpl .existingSecret $global }}/{{ tpl .existingSecretKey $global }} >> $MINIO_ACCESSKEY_SECRETKEY_TMP # Add a new line if it doesn't exist sed -i '$a\' $MINIO_ACCESSKEY_SECRETKEY_TMP {{ else }} echo {{ .secretKey }} >> $MINIO_ACCESSKEY_SECRETKEY_TMP {{- end }} {{- if $svc.policy}} createSvcacct {{ .user }} svc_policy_{{ $idx }} {{ else }} createSvcacct {{ .user }}...