def describe_scaling_activities(ActivityIds=None, AutoScalingGroupName=None,
    MaxRecords=None, NextToken=None):
    """
    Describes one or more scaling activities for the specified Auto Scaling group.
    See also: AWS API Documentation
    
    Examples
    This example describes the scaling activities for the specified Auto Scaling group.
    Expected Output:
    
    :example: response = client.describe_scaling_activities(
        ActivityIds=[
            'string',
        ],
        AutoScalingGroupName='string',
        MaxRecords=123,
        NextToken='string'
    )
    
    
    :type ActivityIds: list
    :param ActivityIds: The activity IDs of the desired scaling activities. If you omit this parameter, all activities for the past six weeks are described. If you specify an Auto Scaling group, the results are limited to that group. The list of requested activities cannot contain more than 50 items. If unknown activities are requested, they are ignored with no error.
            (string) --
            

    :type AutoScalingGroupName: string
    :param AutoScalingGroupName: The name of the group.

    :type MaxRecords: integer
    :param MaxRecords: The maximum number of items to return with this call. The default value is 100.

    :type NextToken: string
    :param NextToken: The token for the next set of items to return. (You received this token from a previous call.)

    :rtype: dict
    :return: {
        'Activities': [
            {
                'ActivityId': 'string',
                'AutoScalingGroupName': 'string',
                'Description': 'string',
                'Cause': 'string',
                'StartTime': datetime(2015, 1, 1),
                'EndTime': datetime(2015, 1, 1),
                'StatusCode': 'PendingSpotBidPlacement'|'WaitingForSpotInstanceRequestId'|'WaitingForSpotInstanceId'|'WaitingForInstanceId'|'PreInService'|'InProgress'|'WaitingForELBConnectionDraining'|'MidLifecycleAction'|'WaitingForInstanceWarmup'|'Successful'|'Failed'|'Cancelled',
                'StatusMessage': 'string',
                'Progress': 123,
                'Details': 'string'
            },
        ],
        'NextToken': 'string'
    }
    
    
    """
    pass
