[modeller_usage] using model-loop-refine in Modeller9v1

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Hi,
I am new to modeller and I have trouble creating a homology model of a
protein using model-loop-refine. I modified the model-loop-refine.py script as
shown below and I got error messages. I would appreciate it if any one
can give me any suggestion.
Thanks.

from modeller import *
from modeller.automodel import *

log.verbose()
env = environ()

env.io.atom_files_directory = './:../atom_files'

# Create a new class based on 'loopmodel' so that we can redefine
# select_loop_atoms
class myloop(loopmodel):
    # This routine picks the residues to be refined by loop modeling
    def select_loop_atoms(self):
        return selection(self.residue_range('53:', '67:')
                    (self.residue_range('89:', '96:')
                    (self.residue_range('118:', '144:')
                    (self.residue_range('166:', '177:')
                    (self.residue_range('199:', '221:')
                    (self.residue_range('243:', '254:'))

a = myloop(env,
           alnfile  = 'seg.ali',      # alignment filename
           knowns   = '1u19A',               # codes of the templates
           sequence = 'mrg1',               # code of the target
           loop_assess_methods=assess.DOPE) # assess each loop with DOPE
a.starting_model= 1                 # index of the first model 
a.ending_model  = 1                 # index of the last model

a.loop.starting_model = 1           # First loop model
a.loop.ending_model   = 2           # Last loop model

a.make()                            # do modeling and loop refinement

This is the error:
  File "model-loop-refine.py", line 21
    m = myloop(env,
    ^
SyntaxError: invalid syntax