[Tutor] How to group data?

[tee chwee liong]

hi,
 
i'm using Python 2.5 and Win XP.
i want to extract the last column of the attached text file and group 128 characters to each row. want the result to look like:
Row1=XXXXX.............................1XXX  (total of 128 char)
Row2=11XX...............................X1XX (total of 128 char)
 
###code
from __future__ import with_statement
def main():
    new_rows = {}
    values = []
    with open('test2.txt') as f:
        for line in f:
            values.append(line.rstrip('\n')[-1])
            
    x = []          # making a new list here, not only
    x += values     # a new reference to the same object

    for count in xrange(0,len(values),128):
                
        temp_values1 = (x.pop(9))+(x.pop(8))+(x.pop(7))+(x.pop(6))+(x.pop(5))+(x.pop(4))+(x.pop(3))+(x.pop(2))+(x.pop(1))+(x.pop(0))
        temp_values2 = (x.pop(19))+(x.pop(18))+(x.pop(17))+(x.pop(16))+(x.pop(15))+(x.pop(14))+(x.pop(13))+(x.pop(12))+(x.pop(11))+(x.pop(10))
        temp_values3 = (x.pop(29))+(x.pop(28))+(x.pop(27))+(x.pop(26))+(x.pop(25))+(x.pop(24))+(x.pop(23))+(x.pop(22))+(x.pop(21))+(x.pop(20))
        temp_values4 = (x.pop(39))+(x.pop(38))+(x.pop(37))+(x.pop(36))+(x.pop(35))+(x.pop(34))+(x.pop(33))+(x.pop(32))+(x.pop(31))+(x.pop(30))
        temp_values5 = (x.pop(49))+(x.pop(48))+(x.pop(47))+(x.pop(46))+(x.pop(45))+(x.pop(44))+(x.pop(43))+(x.pop(42))+(x.pop(41))+(x.pop(40))
        temp_values6 = (x.pop(59))+(x.pop(58))+(x.pop(57))+(x.pop(56))+(x.pop(55))+(x.pop(54))+(x.pop(53))+(x.pop(52))+(x.pop(51))+(x.pop(50))
        temp_values7 = (x.pop(69))+(x.pop(68))+(x.pop(67))+(x.pop(66))+(x.pop(65))+(x.pop(64))+(x.pop(63))+(x.pop(62))+(x.pop(61))+(x.pop(60))
        temp_values8 = (x.pop(79))+(x.pop(78))+(x.pop(77))+(x.pop(76))+(x.pop(75))+(x.pop(74))+(x.pop(73))+(x.pop(72))+(x.pop(71))+(x.pop(70))
        temp_values9 = (x.pop(89))+(x.pop(88))+(x.pop(87))+(x.pop(86))+(x.pop(85))+(x.pop(84))+(x.pop(83))+(x.pop(82))+(x.pop(81))+(x.pop(80))
        temp_values10 = (x.pop(99))+(x.pop(98))+(x.pop(97))+(x.pop(96))+(x.pop(95))+(x.pop(94))+(x.pop(93))+(x.pop(92))+(x.pop(91))+(x.pop(90))
        temp_values11 = (x.pop(109))+(x.pop(108))+(x.pop(107))+(x.pop(106))+(x.pop(105))+(x.pop(104))+(x.pop(103))+(x.pop(102))+(x.pop(101))+(x.pop(100))
        temp_values12 = (x.pop(119))+(x.pop(118))+(x.pop(117))+(x.pop(116))+(x.pop(115))+(x.pop(114))+(x.pop(113))+(x.pop(112))+(x.pop(111))+(x.pop(110))
        temp_values13 = (x.pop(127))+(x.pop(126))+(x.pop(125))+(x.pop(124))+(x.pop(123))+(x.pop(122))+(x.pop(121))+(x.pop(120)) 
        
        
        temp_values=temp_values1+temp_values2+temp_values3+temp_values4+temp_values5+temp_values6+temp_values7+temp_values8+temp_values9+temp_values10+temp_values11+temp_values12+temp_values13
        
        new_rows['ROW'+str(count+1)] = temp_values
    print new_rows
if __name__ == '__main__':
    main()
######
 
but getting error:
>>> 
Traceback (most recent call last):
  File "C:/Python25/myscript/group/group5.py", line 43, in <module>
    main()
  File "C:/Python25/myscript/group/group5.py", line 26, in main
    temp_values8 = (x.pop(79))+(x.pop(78))+(x.pop(77))+(x.pop(76))+(x.pop(75))+(x.pop(74))+(x.pop(73))+(x.pop(72))+(x.pop(71))+(x.pop(70))
IndexError: pop index out of range
 
pls advise. tq 		 	   		  
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