[PyMOL] transparent sticks

Hi,

I want to set some transparency in a selection, which is displayed as 
sticks. I'm using the following command:

cmd.set("stick_transparency",0.5,"ret") # where ret is the selection

But when I run the script, ALL the sticks are modified, and not only the 
selection "ret", as I was expecting.

I've been trying a few variations in the syntax, but I can't figure out 
the correct way... any help?

Thanks in advance,

Xavier

-- 
Xavier Deupi, Ph.D.
Department of Molecular and Cellular Physiology
Beckman Center for Molecular and Genetic Medicine (B161)
279 Campus Drive, Stanford University School of Medicine
Stanford, CA 94305 (USA)

E-mail: Xav...@st...
Phone: +1 (650) 725-6497
Fax : +1 (650) 725-8021