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Getting Started with PyCape#

This guide provides an example of using pycape to run encrypted learning on Cape Cloud.


  • Python 3.6 or above.
  • Cape Privacy recommends using a virtual environment such as venv.


You can install Cape Python with pip:

pip install pycape


Register on Cape Cloud, Create an Organization and a Project#

To get started using Cape, you will need to register on Cape Cloud. Once registered, you can create an organization (or join one you were invited to) and create your first project.

Once your project is set up, you will want to generate an Organizational Token and a user token. These are managed on your organizational settings and user settings pages.


Depending on your role and permissions in the organization, you may not be able to create and use organizational tokens. If someone else is an operator or an organizational administrator, they can create and use these tokens.

Deploy a Cape Worker#

If you are working alongside an operator, ensure they set up the Cape worker able to reach the Cape Cloud and the Amazon S3 bucket you would like to use. They will also need the organizational token to identify the worker to the Cape Cloud service. More information can be found in the Cape Worker documentation.

Prepare and Add Data to Storage#

Once the Cape worker is deployed, you'll want to add any files you plan on using for your project to the Amazon S3 bucket storage or another persistent storage that the worker can access. You will want to coordinate on indeces and aggregation with the other organization to ensure they line up when encrypted learning jobs are running. For more tips, please see our Linear Regression best practices.

Login and Register Your Dataviews#

First, you'll need to login to Cape by following the library's login method and variables. Once you are logged in, you can register dataviews using a few short commands.

# List projects
my_projects = c.list_projects()

# Register a Dataview
my_project = c.get_project(id="project_123")
my_project.create_dataview(name="my-data", uri="s3://my-data.csv", owner_label="my-org")

Run Your First Encrypted Learning Job#

To create and run your first encrypted learning job, you'll use the pycape library.

# List all dataviews

# Select the ones you want to use
dataview_1 = my_project.get_dataview(id="01EY48")
dataview_2 = my_project.get_dataview(id="01EY49")

# Create a linear regression job
vlr = VerticallyPartitionedLinearRegression(

# Submit a job 
lr_job = my_project.submit_job(job=vlr)

# Check job status and pull results
weights, metrics = lr_job.get_results()

For a more detailed walkthrough, please review our Linear Regression tutorial.