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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:

def create_secret(
        name,
        namespace='default',
        data=None,
        source=None,
        template=None,
        saltenv='base',
        **kwargs):
    '''
    Creates the kubernetes secret as defined by the user.

    CLI Examples::

        salt 'minion1' kubernetes.create_secret \
            passwords default '{"db": "letmein"}'

        salt 'minion2' kubernetes.create_secret \
            name=passwords namespace=default data='{"db": "letmein"}'
    '''
    if source:
        data = __read_and_render_yaml_file(source, template, saltenv)
    elif data is None:
        data = {}

    data = __enforce_only_strings_dict(data)

    # encode the secrets using base64 as required by kubernetes
    for key in data:
        data[key] = base64.b64encode(data[key])

    body = kubernetes.client.V1Secret(
        metadata=__dict_to_object_meta(name, namespace, {}),
        data=data)

    cfg = _setup_conn(**kwargs)

    try:
        api_instance = kubernetes.client.CoreV1Api()
        api_response = api_instance.create_namespaced_secret(
            namespace, body)

        return api_response.to_dict()
    except (ApiException, HTTPError) as exc:
        if isinstance(exc, ApiException) and exc.status == 404:
            return None
        else:
            log.exception(
                'Exception when calling '
                'CoreV1Api->create_namespaced_secret'
            )
            raise CommandExecutionError(exc)
    finally:
        _cleanup(**cfg)