rodis

#!/usr/bin/env python

# set to executabable with chmod +x
# and place somewhere in your path

from time import sleep
from sys import argv
from subprocess import Popen

# should match the name of the system preferences window
your_monitor = ""

ninety = '''
tell application "System Preferences"
	quit
	delay 1
	launch
	activate
	reveal pane id "com.apple.preference.displays"
	tell application "System Events"
		tell process "System Preferences"
			delay 1
			tell window "''' + your_monitor +'"' + '''
				click pop up button "Rotation:" of tab group 1
				delay 1
				keystroke "90" & return
				set success to 0
				repeat until success is equal to 1
					delay 1
					try
						tell sheet 1
							click button "Confirm"
							set success to 1
						end tell
					on error errText
						log errText
						delay 1
					end try
				end repeat
			end tell
		end tell
	end tell
end tell
'''

zero = '''
tell application "System Preferences"
	quit
	delay 1
	launch
	activate
	reveal pane id "com.apple.preference.displays"
	tell application "System Events"
		tell process "System Preferences"
			delay 1
                                tell window "''' + your_monitor +'"' + '''
				click pop up button "Rotation:" of tab group 1
				keystroke "Standard" & return
				-- If "Standard" is selected, no confirmation dialog is displayed.
			end tell
		end tell
	end tell
end tell
'''

if argv[1] == '0':
    with open('tmp.applescript','w+') as temp:
        temp.write(zero)
    Popen(['osascript', 'tmp.applescript']).wait()
    Popen(['rm', 'tmp.applescript']).wait()

if argv[1] == '90':
    with open('tmp.applescript','w+') as temp:
        temp.write(ninety)
    Popen(['osascript', 'tmp.applescript']).wait()
    Popen(['rm', 'tmp.applescript']).wait()
    

based on https://gist.github.com/twlz0ne/4708084