#import library to do http requests:
import urllib.request
#import pyserial Library
import serial
#import time library for delays
import time

#import xml parser called minidom:
from xml.dom.minidom import parseString

#Initialize the Serial connection in COM3 or whatever port your arduino uses at 9600 baud rate
ser = serial.Serial("COM11", 9600)
i = 1
#delay for stability while connection is achieved
time.sleep(5)
while i == 1:
     #download the rss file feel free to put your own rss url in here
     file = urllib.request.urlopen('http://rss.cbc.ca/lineup/canada.xml')
     #convert to string
     data = file.read()
     #close the file
     file.close()
     #parse the xml from the string
     dom = parseString(data)
     #retrieve the first xml tag (<tag>data</tag>) that the parser finds with name tagName change tags to get different data
     xmlTag = dom.getElementsByTagName('title')[2].toxml()
     # the [2] indicates the 3rd title tag it finds will be parsed, counting starts at 0
     #strip off the tag (<tag>data</tag>  --->   data)
     xmlData=xmlTag.replace('<title>','').replace('</title>','')
     #write the marker ~ to serial
     #ser.write(bytes('~', encoding = 'ascii'))
     time.sleep(5)
     #split the string into individual words
     nums = xmlData.split(' ')
     #loop until all words in string have been printed
     for num in nums:
          #write 1 word
          ser.write(bytes(num.upper(), encoding='ascii'))
          # write 1 space
          ser.write(bytes(' ',encoding='ascii'))
          # THE DELAY IS NECESSARY. It prevents overflow of the arduino buffer.
          time.sleep(2)

     # write ~ to close the string and tell arduino information sending is finished
     #ser.write(bytes('~', encoding = 'ascii'))

     # wait 5 minutes before rechecking RSS and resending data to Arduino
     time.sleep(5)