[PyMOL] Get dihedral angle of multiple objects

[Val Yu <qi...@uc...>]

Hi,

I'm trying to use this script to get a specific dihedral angle from all the
objects and write into a file:

PyMOL>f = open('dih.txt','w')
PyMOL>for obj in cmd.get_object_list():\
PyMOL>    dih =
cmd.dihedral('dih','/obj///655/CA','/obj///655/CB','/obj///655/CG','/obj///655/CD1')\
PyMOL>    f.write(str(dih))

The software shows following complains:
Selector-Error: Invalid selection name "obj".
( ( ( % obj ) & i; 655 & n; CA ) )<--
Selector-Error: Invalid selection name "obj".
( ( ( % obj ) & i; 655 & n; CB ) )<--
Selector-Error: Invalid selection name "obj".
( ( ( % obj ) & i; 655 & n; CG ) )<--
Selector-Error: Invalid selection name "obj".
( ( ( % obj ) & i; 655 & n; CD1 ) )<--
...

What's wrong with my script?

-- 
Val Yu