def put_scaling_policy(PolicyName=None, ServiceNamespace=None, ResourceId=
    None, ScalableDimension=None, PolicyType=None,
    StepScalingPolicyConfiguration=None):
    """
    Creates or updates a policy for an Application Auto Scaling scalable target.
    Each scalable target is identified by a service namespace, resource ID, and scalable dimension. A scaling policy applies to the scalable target identified by those three attributes. You cannot create a scaling policy without first registering a scalable target using  RegisterScalableTarget .
    To update a policy, specify its policy name and the parameters that you want to change. Any parameters that you don't specify are not changed by this update request.
    You can view the scaling policies for a service namespace using  DescribeScalingPolicies . If you are no longer using a scaling policy, you can delete it using  DeleteScalingPolicy .
    See also: AWS API Documentation
    
    Examples
    This example applies a scaling policy to an Amazon ECS service called web-app in the default cluster. The policy increases the desired count of the service by 200%, with a cool down period of 60 seconds.
    Expected Output:
    This example applies a scaling policy to an Amazon EC2 Spot fleet. The policy increases the target capacity of the spot fleet by 200%, with a cool down period of 180 seconds.",
    Expected Output:
    
    :example: response = client.put_scaling_policy(
        PolicyName='string',
        ServiceNamespace='ecs'|'elasticmapreduce'|'ec2'|'appstream',
        ResourceId='string',
        ScalableDimension='ecs:service:DesiredCount'|'ec2:spot-fleet-request:TargetCapacity'|'elasticmapreduce:instancegroup:InstanceCount'|'appstream:fleet:DesiredCapacity',
        PolicyType='StepScaling',
        StepScalingPolicyConfiguration={
            'AdjustmentType': 'ChangeInCapacity'|'PercentChangeInCapacity'|'ExactCapacity',
            'StepAdjustments': [
                {
                    'MetricIntervalLowerBound': 123.0,
                    'MetricIntervalUpperBound': 123.0,
                    'ScalingAdjustment': 123
                },
            ],
            'MinAdjustmentMagnitude': 123,
            'Cooldown': 123,
            'MetricAggregationType': 'Average'|'Minimum'|'Maximum'
        }
    )
    
    
    :type PolicyName: string
    :param PolicyName: [REQUIRED]
            The name of the scaling policy.
            

    :type ServiceNamespace: string
    :param ServiceNamespace: [REQUIRED]
            The namespace of the AWS service. For more information, see AWS Service Namespaces in the Amazon Web Services General Reference .
            

    :type ResourceId: string
    :param ResourceId: [REQUIRED]
            The identifier of the resource associated with the scaling policy. This string consists of the resource type and unique identifier.
            ECS service - The resource type is service and the unique identifier is the cluster name and service name. Example: service/default/sample-webapp .
            Spot fleet request - The resource type is spot-fleet-request and the unique identifier is the Spot fleet request ID. Example: spot-fleet-request/sfr-73fbd2ce-aa30-494c-8788-1cee4EXAMPLE .
            EMR cluster - The resource type is instancegroup and the unique identifier is the cluster ID and instance group ID. Example: instancegroup/j-2EEZNYKUA1NTV/ig-1791Y4E1L8YI0 .
            AppStream 2.0 fleet - The resource type is fleet and the unique identifier is the fleet name. Example: fleet/sample-fleet .
            

    :type ScalableDimension: string
    :param ScalableDimension: [REQUIRED]
            The scalable dimension. This string consists of the service namespace, resource type, and scaling property.
            ecs:service:DesiredCount - The desired task count of an ECS service.
            ec2:spot-fleet-request:TargetCapacity - The target capacity of a Spot fleet request.
            elasticmapreduce:instancegroup:InstanceCount - The instance count of an EMR Instance Group.
            appstream:fleet:DesiredCapacity - The desired capacity of an AppStream 2.0 fleet.
            

    :type PolicyType: string
    :param PolicyType: The policy type. If you are creating a new policy, this parameter is required. If you are updating a policy, this parameter is not required.

    :type StepScalingPolicyConfiguration: dict
    :param StepScalingPolicyConfiguration: The configuration for the step scaling policy. If you are creating a new policy, this parameter is required. If you are updating a policy, this parameter is not required. For more information, see StepScalingPolicyConfiguration and StepAdjustment .
            AdjustmentType (string) --The adjustment type, which specifies how the ScalingAdjustment parameter in a StepAdjustment is interpreted.
            StepAdjustments (list) --A set of adjustments that enable you to scale based on the size of the alarm breach.
            (dict) --Represents a step adjustment for a StepScalingPolicyConfiguration . Describes an adjustment based on the difference between the value of the aggregated CloudWatch metric and the breach threshold that you've defined for the alarm.
            For the following examples, suppose that you have an alarm with a breach threshold of 50:
            To trigger the adjustment when the metric is greater than or equal to 50 and less than 60, specify a lower bound of 0 and an upper bound of 10.
            To trigger the adjustment when the metric is greater than 40 and less than or equal to 50, specify a lower bound of -10 and an upper bound of 0.
            There are a few rules for the step adjustments for your step policy:
            The ranges of your step adjustments can't overlap or have a gap.
            At most one step adjustment can have a null lower bound. If one step adjustment has a negative lower bound, then there must be a step adjustment with a null lower bound.
            At most one step adjustment can have a null upper bound. If one step adjustment has a positive upper bound, then there must be a step adjustment with a null upper bound.
            The upper and lower bound can't be null in the same step adjustment.
            MetricIntervalLowerBound (float) --The lower bound for the difference between the alarm threshold and the CloudWatch metric. If the metric value is above the breach threshold, the lower bound is inclusive (the metric must be greater than or equal to the threshold plus the lower bound). Otherwise, it is exclusive (the metric must be greater than the threshold plus the lower bound). A null value indicates negative infinity.
            MetricIntervalUpperBound (float) --The upper bound for the difference between the alarm threshold and the CloudWatch metric. If the metric value is above the breach threshold, the upper bound is exclusive (the metric must be less than the threshold plus the upper bound). Otherwise, it is inclusive (the metric must be less than or equal to the threshold plus the upper bound). A null value indicates positive infinity.
            The upper bound must be greater than the lower bound.
            ScalingAdjustment (integer) -- [REQUIRED]The amount by which to scale, based on the specified adjustment type. A positive value adds to the current scalable dimension while a negative number removes from the current scalable dimension.
            
            MinAdjustmentMagnitude (integer) --The minimum number to adjust your scalable dimension as a result of a scaling activity. If the adjustment type is PercentChangeInCapacity , the scaling policy changes the scalable dimension of the scalable target by this amount.
            Cooldown (integer) --The amount of time, in seconds, after a scaling activity completes where previous trigger-related scaling activities can influence future scaling events.
            For scale out policies, while Cooldown is in effect, the capacity that has been added by the previous scale out event that initiated the Cooldown is calculated as part of the desired capacity for the next scale out. The intention is to continuously (but not excessively) scale out. For example, an alarm triggers a step scaling policy to scale out an Amazon ECS service by 2 tasks, the scaling activity completes successfully, and a Cooldown period of 5 minutes starts. During the Cooldown period, if the alarm triggers the same policy again but at a more aggressive step adjustment to scale out the service by 3 tasks, the 2 tasks that were added in the previous scale out event are considered part of that capacity and only 1 additional task is added to the desired count.
            For scale in policies, the Cooldown period is used to block subsequent scale in requests until it has expired. The intention is to scale in conservatively to protect your application's availability. However, if another alarm triggers a scale out policy during the Cooldown period after a scale-in, Application Auto Scaling scales out your scalable target immediately.
            MetricAggregationType (string) --The aggregation type for the CloudWatch metrics. Valid values are Minimum , Maximum , and Average .
            

    :rtype: dict
    :return: {
        'PolicyARN': 'string'
    }
    
    
    """
    pass
