How to use the azure-mgmt-recoveryservicesbackup.azure.mgmt.recoveryservicesbackup.models.retention_policy.RetentionPolicy function in azure-mgmt-recoveryservicesbackup

# coding=utf-8
# --------------------------------------------------------------------------
# Copyright (c) Microsoft Corporation. All rights reserved.
# Licensed under the MIT License. See License.txt in the project root for
# license information.
#
# Code generated by Microsoft (R) AutoRest Code Generator.
# Changes may cause incorrect behavior and will be lost if the code is
# regenerated.
# --------------------------------------------------------------------------

from .retention_policy import RetentionPolicy


class LongTermRetentionPolicy(RetentionPolicy):
    """Long term retention policy.

    All required parameters must be populated in order to send to Azure.

    :param retention_policy_type: Required. Constant filled by server.
    :type retention_policy_type: str
    :param daily_schedule: Daily retention schedule of the protection policy.
    :type daily_schedule:
     ~azure.mgmt.recoveryservicesbackup.models.DailyRetentionSchedule
    :param weekly_schedule: Weekly retention schedule of the protection
     policy.
    :type weekly_schedule:
     ~azure.mgmt.recoveryservicesbackup.models.WeeklyRetentionSchedule
    :param monthly_schedule: Monthly retention schedule of the protection
     policy.
    :type monthly_schedule:

def __init__(self, **kwargs):
        super(RetentionPolicy, self).__init__(**kwargs)
        self.retention_policy_type = None

# coding=utf-8
# --------------------------------------------------------------------------
# Copyright (c) Microsoft Corporation. All rights reserved.
# Licensed under the MIT License. See License.txt in the project root for
# license information.
#
# Code generated by Microsoft (R) AutoRest Code Generator.
# Changes may cause incorrect behavior and will be lost if the code is
# regenerated.
# --------------------------------------------------------------------------

from .retention_policy import RetentionPolicy


class SimpleRetentionPolicy(RetentionPolicy):
    """Simple policy retention.

    All required parameters must be populated in order to send to Azure.

    :param retention_policy_type: Required. Constant filled by server.
    :type retention_policy_type: str
    :param retention_duration: Retention duration of the protection policy.
    :type retention_duration:
     ~azure.mgmt.recoveryservicesbackup.models.RetentionDuration
    """

    _validation = {
        'retention_policy_type': {'required': True},
    }

    _attribute_map = {