Py script to convert a text file containing data to a mahout datafile format, which is values separated by commas(CSV)

CSV.py

def main():

   myfile = open('words.txt', 'r')
   outfile = open('wordsoutput.txt', 'w')
   for line in myfile:
      line_list = line.split('::')
      new_line = ','.join(line_list[:-1])
      outfile.write(new_line)
      outfile.write('\n')
                        
main()