writing in to excel sheet with label

Dear all,

I am reading data from Serial port. data are in format below. Below code are seprating the data. I wanna know how can write it in excel sheet with time and date/mode/ dir/ actual postion as header and values which are CSV under paricular header


----------
time and date: 23-3-13 3:14:23
mode:1
dir:fw
actual pos:30
desired pos:28
------


[code]

import serial
import csv
import os
import time


def main():
pass

if __name__ == '__main__':
main()
COUNT=0
while(COUNT<=2):
ser=serial.Serial()
ser.port=12
ser.baudrate=9600
ser.open()
str=ser.read(150)
val=str.split(":")
print "value is",val
lines=str.split("
")
ser.close()
COUNT=COUNT+1
for lines in lines[:-1]:
parts=lines.split(":")
foo=open("new.txt","a+");
foo.write("%s," % ":".join(parts[1:]))
print parts[1:]
foo.write("
")
foo.close()


[/code]