[Tutor] File IO

[Michael Haft]

Hello,
     I tried the following code:

def readSOMNETM(inputName):
    input = open(inputName, "r")
    result = []
    for line in input:
        fields = line.split()
        data = fields[1] + fields[2] + fields[7]
        result.append(data)
    input.close()
    return result


print "Here goes"
print "Enter filename:"
filename = raw_input("Name:")
print readSOMNETM(filename)
print "might work"

on  a file that lookes like this:

Monthly Weather Data, LAU73M.MET, converted from:
BAD LAUCHSTAEDT; DAILY METEOROLOGICAL DATA FOR 01/01/1973-31/12/1973
VAP, DEWP CALCULATED FROM MEASURED AVTEMP AND HUMID DATA
MONTH	RAIN	AVTEMP	S10	RAD	SUN	WIND	EVAPW
**************************************************************
1	22.5	0.3	*	54.6	15.1	*	11.9
2	16.1	1.8	*	110	51.1	*	18.1
3	16.4	4.8	*	227.5	94.5	*	36.8
4	19.5	5.9	*	286.3	89	*	45.5
5	36.1	13.2	*	448.5	164.6	*	83
6	36	16.9	*	525.7	208.8	*	105.7
7	37.7	18.2	*	459.7	165.4	*	98.6
8	29.3	18.2	*	463.8	206.8	*	97.9
9	27	14.8	*	277.5	119.5	*	58.7
10	57.6	7.6	*	158.7	72.2	*	31.3
11	23.4	3.9	*	98.3	75.6	*	19.1
12	14	0.7	*	55.5	38	*	12.5


And recieved the following error:

Traceback (most recent call last):
  File "C:\Python24\INProgress.py", line 15, in -toplevel-
    print readSOMNETM(filename)
  File "C:\Python24\INProgress.py", line 6, in readSOMNETM
    data = fields[1] + fields[2] + fields[7]
IndexError: list index out of range

Essentially I'm trying to write a bit of code that can take any of the
fields in the above data i.e. rain temp evap for each month for a hundred
or so files like this one and spit out a file at the end that has the data
in a different format.

Any help would be very much appreciated I need to get this done by the end
of next week

Thanks

Mike