cycle-workspace.py

#!/usr/bin/env python
 
import i3

outputs = i3.get_outputs()
workspaces = i3.get_workspaces()

# figure out what is on, and what is currently on your screen.
workspace = list(filter(lambda s: s['focused'], workspaces))[0]
output = list(filter(lambda s: s['active'], outputs))

# figure out the other workspace name
other_workspace = list(filter(lambda s: s['name']!=workspace['output'], output))[0]

# send current to the no-active one
i3.command('move', 'workspace to output '+other_workspace['name'])