setExpression x and y values

[blue209]

I'm sure this is something really simple but I can't seem to figure it out. I'm trying to set an expression on a center knob for x and y. This is essentially what I want to do...

n['center'].setExpression('width/2', 'height/2')

but the only way I can seem to get it to work is using....

n['center'].setExpression('width/2')

which sets both x and y to 'width/2'

Thanks for the help.

[alkali]

Since the "Center" knob is an XY_Knob, you have to specify the index you're trying to set the expression on.

# Set expression on X component
n['center'].setExpression("width/2", 0)
# Set expression on Y component
n['center'].setExpression("width/2", 1)

[blue209]

Of course, that makes perfect sense. I'm still a little green in python, learning more every day though. I was wondering what that second variable was for. Thanks.