AWS Devicefarm API提供了ScheduleRun命令来计划运行测试。在命令中，你可以指定一个ARN回调，该回调将在测试运行完成后被调用。以下是一个使用ScheduleRun命令的示例，其中指定了ARN回调：

import boto3

client = boto3.client('devicefarm', region_name='us-west-2')

# Specify the ARN callback
callback_arn = 'arn:aws:sns:us-west-2:123456789012:MyDeviceFarmCallback'

# Specify the other parameters for the ScheduleRun command
project_arn = 'arn:aws:devicefarm:us-west-2:123456789012:project:EXAMPLE-GUID-123-456'
device_pool_arn = 'arn:aws:devicefarm:us-west-2:123456789012:devicepool:EXAMPLE-GUID-123-456'
app_arn = 'arn:aws:devicefarm:us-west-2:123456789012:upload:EXAMPLE-GUID-123-456/app.apk'
test_package_arn = 'arn:aws:devicefarm:us-west-2:123456789012:upload:EXAMPLE-GUID-123-456/test.zip'

# Schedule the run and wait for it to complete
response = client.schedule_run(
    projectArn=project_arn,
    appArn=app_arn,
    devicePoolArn=device_pool_arn,
    test= {
        'type': 'INSTRUMENTATION',
        'testPackageArn': test_package_arn
    },
    configuration= {
        'billingMethod': 'METERED'
    },
    executionConfiguration= {
        'jobTimeoutMinutes': 60
    },
    callbackArn=callback_arn
)

# Get the run ARN and print it
run_arn = response['run']['arn']
print('Scheduled run with ARN:', run_arn)

在这个示例中，当运行完成时，一个ARN回调将被执行。你可以替换“callback_arn”变量的值以指定你自己的ARN回调。