import argparse
import os

def process_sentence(line):
   if line == '': return ''
   res = line[0]
   for i in range(1, len(line)):
       res += (' ' + line[i])
   return res

if __name__ == "__main__":
   paser = argparse.ArgumentParser(description = "Input filename")
   paser.add_argument('-input_file')
   paser.add_argument('-output_file')
   sentence_cnt = 0
   args = paser.parse_args()
   with open(args.input_file, 'r') as f:
       with open(args.output_file, 'w') as write_f:
           while True:
               line = f.readline()
               if line:
                   sentence_cnt += 1 
                   write_f.write(process_sentence(line))
               else:
                   break
   print('preprocess over')
   print('total sentences number:', sentence_cnt)