[Tutor] Saving file changes to output

Daniel D. Laskey, CPA dlaskey@laskeycpa.com
Wed, 2 Aug 2000 12:54:46 -0400

I've been struggling for the last couple of days on this problem.
So it is not as if I am asking the group to do my homework for
me.  Again, I'm a newbie.  I've been studing hard.  Maybe I'm just
learning impaired.  Please be kind.

The "data_file" looks like this:
33.04,123196,12,421020,RVN# 179-Ernest Lonard,12528.7
33.04,123196,12,421020,RVN# 196-Hector Gale,2599.7
33.04,123196,12,421230,RVN# 249-Richard George,2300
33.04,123196,12,420000,Total Sales Journal,-17428.4

import sys
import string

in_file = open("data_file","r")
out_file = open("junk2.txt","w")
for line in in_file.readlines():
	x = string.split(line,',')
	# read each line of file and split at each ","
	f1 = x[4]
	# pull out the fifth position 0,1,2,3,4 of each line 
	f2 = '"' + f1 + '"'	
	# put double quotes " " around this data
	f3 = x[0]+","+x[1]+","+x[2]+","+x[3]+","+f2+","+x[5]
	# print f3
	# rebuild the file using the new position [4] with double quotes

#Traceback (innermost last):
#  File "today.py", line 15, in ?
#    out_file.write(line,f3)
#TypeError: read-only buffer, tuple

My objective is to write the changes I made to the data to my out_file.  When I 
put a print statement after the f3 the file looks fine.  I just can't get it to print 
to the junk2.txt file properly.

Please help ole kind ones.

| Daniel D. Laskey, CPA--------------------dlaskey@laskeycpa.com
| Daniel D. Laskey Company, P.C.--------231-723-8305  / Fax 231-723-6097
| Certified Public Accountants
| 507 Water Street
| Manistee, MI  49660