new_contents: #!/usr/bin/python
  #-*-coding:utf-8 -*-
  # author: mld
  # email: miradel51@126.com
  # date : 2017/9/28
  
  
  import sys
  import string
  import re
  
  
  def de_tokenizestr(original_str):
  
  	after_de_tok = ""
  
  	original_str = original_str.replace(" [","[")
  	original_str = original_str.replace(" !",'!')
  	original_str = original_str.replace(" %","%")
  	original_str = original_str.replace(" #","#")
  	original_str = original_str.replace(" @","@")
  	original_str = original_str.replace("~ ","~")
  	original_str = original_str.replace(" &","&")
  	original_str = original_str.replace(" *","*")
  	original_str = original_str.replace(" .",".")
  	original_str = original_str.replace(" ;",";")
  	original_str = original_str.replace(" ,",",")
  	original_str = original_str.replace(" ^","^")
  	original_str = original_str.replace(" (","(")
  	original_str = original_str.replace(" )",")")
  	original_str = original_str.replace(" {","{")
  	original_str = original_str.replace(" >",">")
  	original_str = original_str.replace(" ?","?")
  	original_str = original_str.replace(" }","}")
  	original_str = original_str.replace(" -","-")
  	original_str = original_str.replace(" :",":")
  	original_str = original_str.replace(" =","=")
  	original_str = original_str.replace(" +","+")
  
  	after_de_tok = original_str
  	
  	return after_de_tok
  
  if __name__ == '__main__':
  
  	ori_ = sys.argv[1]
  	de_tok_ = sys.argv[2]
  
  	ori_file = open(ori_,"r")
  	de_tok_file = open(de_tok_,"w")
  
  	context = ""
  
  	for eachline in ori_file:
  
  		context = eachline.strip()
  
  		#need to tokenization (just separate symboles from words in current line)
  		context = de_tokenizestr(context)
  
  		de_tok_file.write(context)
  		de_tok_file.write("\n")
  
  ori_file.close()
  de_tok_file.close()
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