def copy_db_snapshot(SourceDBSnapshotIdentifier=None,
    TargetDBSnapshotIdentifier=None, KmsKeyId=None, Tags=None, CopyTags=
    None, PreSignedUrl=None, SourceRegion=None):
    """
    Copies the specified DB snapshot. The source DB snapshot must be in the "available" state.
    To copy a DB snapshot from a shared manual DB snapshot, SourceDBSnapshotIdentifier must be the Amazon Resource Name (ARN) of the shared DB snapshot.
    You can copy an encrypted DB snapshot from another AWS region. In that case, the region where you call the CopyDBSnapshot action is the destination region for the encrypted DB snapshot to be copied to. To copy an encrypted DB snapshot from another region, you must provide the following values:
    To learn how to generate a Signature Version 4 signed request, see Authenticating Requests: Using Query Parameters (AWS Signature Version 4) and Signature Version 4 Signing Process .
    For more information on copying encrypted snapshots from one region to another, see Copying a DB Snapshot in the Amazon RDS User Guide.
    See also: AWS API Documentation
    
    Examples
    This example copies a DB snapshot.
    Expected Output:
    
    :example: response = client.copy_db_snapshot(
        SourceDBSnapshotIdentifier='string',
        TargetDBSnapshotIdentifier='string',
        KmsKeyId='string',
        Tags=[
            {
                'Key': 'string',
                'Value': 'string'
            },
        ],
        CopyTags=True|False,
        SourceRegion='string'
    )
    
    
    :type SourceDBSnapshotIdentifier: string
    :param SourceDBSnapshotIdentifier: [REQUIRED]
            The identifier for the source DB snapshot.
            If you are copying from a shared manual DB snapshot, this must be the ARN of the shared DB snapshot.
            You cannot copy an encrypted, shared DB snapshot from one AWS region to another.
            Constraints:
            Must specify a valid system snapshot in the 'available' state.
            If the source snapshot is in the same region as the copy, specify a valid DB snapshot identifier.
            If the source snapshot is in a different region than the copy, specify a valid DB snapshot ARN. For more information, go to Copying a DB Snapshot or DB Cluster Snapshot .
            Example: rds:mydb-2012-04-02-00-01
            Example: arn:aws:rds:us-west-2:123456789012:snapshot:mysql-instance1-snapshot-20130805
            

    :type TargetDBSnapshotIdentifier: string
    :param TargetDBSnapshotIdentifier: [REQUIRED]
            The identifier for the copied snapshot.
            Constraints:
            Cannot be null, empty, or blank
            Must contain from 1 to 255 alphanumeric characters or hyphens
            First character must be a letter
            Cannot end with a hyphen or contain two consecutive hyphens
            Example: my-db-snapshot
            

    :type KmsKeyId: string
    :param KmsKeyId: The AWS KMS key ID for an encrypted DB snapshot. The KMS key ID is the Amazon Resource Name (ARN), KMS key identifier, or the KMS key alias for the KMS encryption key.
            If you copy an unencrypted DB snapshot and specify a value for the KmsKeyId parameter, Amazon RDS encrypts the target DB snapshot using the specified KMS encryption key.
            If you copy an encrypted DB snapshot from your AWS account, you can specify a value for KmsKeyId to encrypt the copy with a new KMS encryption key. If you don't specify a value for KmsKeyId , then the copy of the DB snapshot is encrypted with the same KMS key as the source DB snapshot.
            If you copy an encrypted snapshot to a different AWS region, then you must specify a KMS key for the destination AWS region.
            If you copy an encrypted DB snapshot that is shared from another AWS account, then you must specify a value for KmsKeyId .
            To copy an encrypted DB snapshot to another region, you must set KmsKeyId to the KMS key ID used to encrypt the copy of the DB snapshot in the destination region. KMS encryption keys are specific to the region that they are created in, and you cannot use encryption keys from one region in another region.
            

    :type Tags: list
    :param Tags: A list of tags.
            (dict) --Metadata assigned to an Amazon RDS resource consisting of a key-value pair.
            Key (string) --A key is the required name of the tag. The string value can be from 1 to 128 Unicode characters in length and cannot be prefixed with 'aws:' or 'rds:'. The string can only contain only the set of Unicode letters, digits, white-space, '_', '.', '/', '=', '+', '-' (Java regex: '^([\\p{L}\\p{Z}\\p{N}_.:/=+\\-]*)$').
            Value (string) --A value is the optional value of the tag. The string value can be from 1 to 256 Unicode characters in length and cannot be prefixed with 'aws:' or 'rds:'. The string can only contain only the set of Unicode letters, digits, white-space, '_', '.', '/', '=', '+', '-' (Java regex: '^([\\p{L}\\p{Z}\\p{N}_.:/=+\\-]*)$').
            
            

    :type CopyTags: boolean
    :param CopyTags: True to copy all tags from the source DB snapshot to the target DB snapshot; otherwise false. The default is false.

    :type PreSignedUrl: string
    :param PreSignedUrl: The URL that contains a Signature Version 4 signed request for the CopyDBSnapshot API action in the AWS region that contains the source DB snapshot to copy. The PreSignedUrl parameter must be used when copying an encrypted DB snapshot from another AWS region.
            The presigned URL must be a valid request for the CopyDBSnapshot API action that can be executed in the source region that contains the encrypted DB snapshot to be copied. The presigned URL request must contain the following parameter values:
            DestinationRegion - The AWS Region that the encrypted DB snapshot will be copied to. This region is the same one where the CopyDBSnapshot action is called that contains this presigned URL. For example, if you copy an encrypted DB snapshot from the us-west-2 region to the us-east-1 region, then you will call the CopyDBSnapshot action in the us-east-1 region and provide a presigned URL that contains a call to the CopyDBSnapshot action in the us-west-2 region. For this example, the DestinationRegion in the presigned URL must be set to the us-east-1 region.
            KmsKeyId - The KMS key identifier for the key to use to encrypt the copy of the DB snapshot in the destination region. This is the same identifier for both the CopyDBSnapshot action that is called in the destination region, and the action contained in the presigned URL.
            SourceDBSnapshotIdentifier - The DB snapshot identifier for the encrypted snapshot to be copied. This identifier must be in the Amazon Resource Name (ARN) format for the source region. For example, if you are copying an encrypted DB snapshot from the us-west-2 region, then your SourceDBSnapshotIdentifier looks like the following example: arn:aws:rds:us-west-2:123456789012:snapshot:mysql-instance1-snapshot-20161115 .
            To learn how to generate a Signature Version 4 signed request, see Authenticating Requests: Using Query Parameters (AWS Signature Version 4) and Signature Version 4 Signing Process .
            Please note that this parameter is automatically populated if it is not provided. Including this parameter is not required
            

    :type SourceRegion: string
    :param SourceRegion: The ID of the region that contains the snapshot to be copied.

    :rtype: dict
    :return: {
        'DBSnapshot': {
            'DBSnapshotIdentifier': 'string',
            'DBInstanceIdentifier': 'string',
            'SnapshotCreateTime': datetime(2015, 1, 1),
            'Engine': 'string',
            'AllocatedStorage': 123,
            'Status': 'string',
            'Port': 123,
            'AvailabilityZone': 'string',
            'VpcId': 'string',
            'InstanceCreateTime': datetime(2015, 1, 1),
            'MasterUsername': 'string',
            'EngineVersion': 'string',
            'LicenseModel': 'string',
            'SnapshotType': 'string',
            'Iops': 123,
            'OptionGroupName': 'string',
            'PercentProgress': 123,
            'SourceRegion': 'string',
            'SourceDBSnapshotIdentifier': 'string',
            'StorageType': 'string',
            'TdeCredentialArn': 'string',
            'Encrypted': True|False,
            'KmsKeyId': 'string',
            'DBSnapshotArn': 'string',
            'Timezone': 'string',
            'IAMDatabaseAuthenticationEnabled': True|False
        }
    }
    
    
    :returns: 
    TargetDBSnapshotIdentifier - The identifier for the new copy of the DB snapshot in the destination region.
    SourceDBSnapshotIdentifier - The DB snapshot identifier for the encrypted snapshot to be copied. This identifier must be in the ARN format for the source region and is the same value as the SourceDBSnapshotIdentifier in the presigned URL.
    
    """
    pass
