[PyMOL] problems creating object using align method

[Sanaa S. <san...@gm...>]

Hello,
Can somebody please help me with creating aligned object using pymol API? i
want   to split chains from my protein and superimpose first chain on the
rest. the chains get loaded. and superimposed as well but i am unable to
save superimposed coordinates in a new file because no object is created.
 this is my script:
list1=["chain_A","chain_B","chain_C","chain_D"]
for every in list1:
        cmd.load("/home/sanaa/pymol/"+every+".pdb")
object_list=cmd.get_object_list()
aligned=[ ]
list2=[ ]
#object=string(alignedA_B)
for j in range(len(object_list)):
       try:
                        aligned=cmd.align(object_list[
0],object_list[j+1],object=AlnAB)
                        list2.append(aligned)
        except IndexError:
                pass

this is giving me name error like:
NameError: name 'AlnAB' is not defined

the object is not being created after calling the align command. it creates
an object if i give the command directly on  pymol command line but not
through the script. i have tried everything. please help!