Parsing txt file using python : List index out of range - python-2.7

Question

Hello I have written a python program to parse data specific data from txt file
my code is:
f = open('C:/Users/aikaterini/Desktop/Ericsson_PARSER/BSC_alarms_vf_OSS.txt','r')
from datetime import datetime
import MySQLdb
def firstl():
with f as lines:
lines = lines.readlines()
print len(lines)
for i,line in enumerate(lines):
if line.startswith("*** Disconnected from"):
conline = line.split()
bsc = conline[-2]
print "\n"*5
print bsc
print "*"*70
break
for i,line in enumerate(lines):
if line.startswith("*** Connected to"):
conline = line.split()
bsc = conline[-2]
print "\n"*5
print bsc
print "*"*70
elif line[:3] == "A1/" or line[:3] == "A2/":
if lines[i+1].startswith("RADIO"):
fal = line.split()
first_alarm_line = [fal[0][:2],fal[-2],fal[-1]]
year = first_alarm_line[1][:2]
month = first_alarm_line[1][2:4]
day = first_alarm_line[1][4:]
hours = first_alarm_line[2][:2]
minutes = first_alarm_line[2][2:]
date = datetime.strptime( day + " " + month + " " + year + " " + \
hours+":"+minutes,"%d %m %y %H:%M")
print first_alarm_line
print date, "\n"
print lines[i+1]
print lines[i+4]
print lines[i+5]
desc_line = lines[i+4]
desc_values_line = lines[i+5]
desc = desc_line.split(None,2)
print desc
desc_values = desc_values_line.split(None,2)
rsite = ""
#for x in desc_values[1]:
# if not (x.isalpha() or x == "0"):
# rsite += x
rsite = desc_values[1].lstrip('RBS0')
print "\t"*2 + "rsite:" + rsite
if desc[-1] == "ALARM SLOGAN\n":
alarm_slogan = desc_values[-1]
print alarm_slogan
x = i
print x # to check the line
print len(line) #check length of lines
while not lines[x].startswith("EXTERNAL"):
x+=1
if lines[x].startswith("EXTERNAL"):
while not lines[x] == "\n":
print lines[x]
x+=1
print "\n"*5
elif lines[i+1].startswith("CELL LOGICAL"):
fal = line.split()
first_alarm_line = [fal[0][:2],fal[-2],fal[-1]]
#print i
print first_alarm_line
type = lines[i+1]
print type
cell_line = lines[i+3]
cell = cell_line.split()[0]
print cell
print "\n"*5
##########Database query###########
#db = MySQLdb.connect(host,user,password,database)
firstl()
when i run the program the results are correct
but it prints until line 50672 while there are 51027
and i get the last printed result with the following error:
['A2', '130919', '0309']
2013-09-19 03:09:00
RADIO X-CEIVER ADMINISTRATION
MO RSITE ALARM SLOGAN
RXOCF-18 RBS03668 OML FAULT
['MO', 'RSITE', 'ALARM SLOGAN\n']
rsite:3668
OML FAULT
50672
51027
Traceback (most recent call last):
File "C:\Python27\parser_v3.py", line 106, in <module>
firstl()
File "C:\Python27\parser_v3.py", line 72, in firstl
while not lines[x].startswith("EXTERNAL"):
IndexError: list index out of range
if i comment the while not line i get :
Traceback (most recent call last):
File "C:\Python27\parser_v3.py", line 106, in <module>
firstl()
File "C:\Python27\parser_v3.py", line 60, in firstl
rsite = desc_values[1].lstrip('RBS0')
IndexError: list index out of range
The txt content is like :
A1/EXT "FS G11B/25/13/3" 382 150308 1431
RADIO X-CEIVER ADMINISTRATION
BTS EXTERNAL FAULT
MO RSITE CLASS
RXOCF-16 RBS02190 1
EXTERNAL ALARM
ALARM SYSTEM ON/OFF G2190 DRAMA CNR
A1/EXT "FS G11B/25/13/3" 755 150312 1434
RADIO X-CEIVER ADMINISTRATION
BTS EXTERNAL FAULT
MO RSITE CLASS
RXOCF-113 RBS00674 1
EXTERNAL ALARM
IS.BOAR FAIL G0674 FALAKRO
I don't understand since i do a split with maxnumber 2 and i get 3 elements as u can see and i am picking the 2nd and if i comment that i get another error when i pick an element from a list and the thing is that returning the correct result.Please help me.
Sorry for the long post thank you in advance.

Answer 1

I'm haven't dug deep into your code, but have you tried validating that x does not exceed the number of elements in lines before trying to access that index? Also, for readability I'd suggest using lines[x] != rather than not lines[x] ==
while x < len(lines) and lines[x] != "\n":

Answer 2

I solved it although i don't know if it is correct way but it works.
I think the problem was that the x was exceeding the length of the list lines containing the file and there had to be a check after the split that the list had length larger or equal to number of elements so :
if len(desc_values) > 2 and len(desc) > 2:
rsite = desc_values[1].lstrip('RBS0')
print "\t"*2 + "rsite:" + rsite
if desc[-1] == "ALARM SLOGAN\n":
alarm_slogan = desc_values[-1]
print alarm_slogan
x = i
print x #to check the line
print len(lines) # check length of lines
while [x] < len(lines): #check so that x doesnt exceed the length of file list "line"
while not lines[x].startswith("EXTERNAL"):
x+=1
if lines[x].startswith("EXTERNAL"):
while lines[x] != "\n":
print lines[x]
x+=1
Thank you man you really helped me although i am trying to find a way to stop the iteration of x to gain some computation time i tried break but it throws you completely of the loop.
Thanks anyway