orientConstraint skip channels?

[shredder]

Hey guys, I am trying to do a simple orient constraint on only one channel with python and I can not get it figured out.

in the docs it shows only an example of how to skip one channel.

cmds.orientConstraint( 'sph1', 'sph2', skip="x" )

I need to skip x and y
what is the syntax for that?

I tried this
cmds.orientConstraint("joint2","FK_CTRL_1",skip="xy")
and got this error
# RuntimeError: Invalid argument for the skip flag. Specify x, y, or z. #  

I tried this (which is how it would be done in mel)
cmds.orientConstraint("joint2","FK_CTRL_1",skip="x",skip="y")
and got this error
# SyntaxError: keyword argument repeated (, line 2) # 

So, simply, how do I orient constrain just one channel in python?

[chen-kun]

import maya.cmds as cmds
cmds.orientConstraint(mo=1,sk=['x','y'])