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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 get_or_create_hosted_zone(client, zone_name):
 """Get the Id of an existing zone, or create it. Args: client (:class:`botocore.client.Route53`):
 The connection used to interact with Route53's API. zone_name (string):
 The name of the DNS hosted zone to create. Returns: string: The Id of the Hosted Zone. """

    zone_id = get_hosted_zone_by_name(client, zone_name)
    if zone_id:
        return zone_id

    logger.debug("Zone %s does not exist, creating.", zone_name)

    reference = uuid.uuid4().hex

    response = client.create_hosted_zone(Name=zone_name,
                                         CallerReference=reference)

    return parse_zone_id(response["HostedZone"]["Id"])