docker_builder for Windows doesn't have Python?

[Jackenmen]

Expected Behavior

I expected that this task will succeed:

docker_builder:
  platform: windows
  os_version: "2019"
  script: python --version

The documentation says that Docker Builder has Python pre-installed: https://cirrus-ci.org/guide/docker-builder-vm/#pre-installed-packages

Real Behavior

The task failed.

Related Info

This is a (tick one of the following):

• [ ] Website issue
  • Link to page:
• [x] Task issue
  • OS: Windows Docker Builder
  • Task name: main
  • Script/cache name (if applies): main https://cirrus-ci.com/task/5506087917977600