Getting started#

This page runs in a Debian-based Linux machine with Python 3.12. Press Run on each block below, top to bottom.

A shell block#

Ask the machine what it is.

uname -a
echo
cat /etc/os-release

The output appears under the block. The kernel line is the Linux kernel running inside WebAssembly, and os-release describes the image the page asked for.

A Python block#

numbers = [3, 1, 4, 1, 5, 9, 2, 6]
total = sum(numbers)
print("numbers:", numbers)
print("total:", total)

numbers: [3, 1, 4, 1, 5, 9, 2, 6]
total: 31

A second Python block that reuses the first#

Blocks of one language on a page share a session, so the variables from the block above are still defined.

print("largest:", max(numbers))
print("mean:", total / len(numbers))

largest: 9
mean: 3.875

If you run this block before the one above it, Python reports that numbers is not defined. Run the first block, then try again.

What next#

• Look around the machine with Inspect a machine.
• Learn how these pages are written in The document format.