在Amazon SageMaker上没有剩余空间时，可以通过以下代码示例解决：

import boto3

def increase_sagemaker_disk_size(instance_name, new_size_gb):
    sagemaker_client = boto3.client('sagemaker')

    # Get the current instance's details
    response = sagemaker_client.describe_notebook_instance(NotebookInstanceName=instance_name)
    current_disk_size_gb = response['VolumeSizeInGB']
    current_disk_size_code = response['DirectInternetAccess']

    # Check if there is enough space for the increase
    if current_disk_size_gb >= new_size_gb:
        print("There is already enough disk space allocated.")
        return

    # Stop the instance
    sagemaker_client.stop_notebook_instance(NotebookInstanceName=instance_name)

    # Update the instance's disk size
    response = sagemaker_client.update_notebook_instance(
        NotebookInstanceName=instance_name,
        VolumeSizeInGB=new_size_gb,
        DirectInternetAccess=current_disk_size_code
    )

    # Start the instance again
    sagemaker_client.start_notebook_instance(NotebookInstanceName=instance_name)

    print("Disk size has been increased to", new_size_gb, "GB.")

# Example usage
increase_sagemaker_disk_size('your-notebook-instance-name', 50)

上述代码通过调用AWS SDK（boto3）中的SageMaker客户端来更新SageMaker实例的磁盘大小。首先，它通过describe_notebook_instance函数获取当前实例的详细信息，然后检查当前磁盘大小是否已经足够。如果不够，它会停止实例，然后使用update_notebook_instance函数来更新磁盘大小，最后再启动实例。

请替换代码中的your-notebook-instance-name为您想要更新的实例的名称，并将50替换为您想要的新磁盘大小（以GB为单位）。