python 多关键词替换 python一键替换

● python /
   ● 字符串替换 /
   ● replace   #!/bin/env python  
    # -*- coding:utf-8 -*-  
      
    import sys  
      
    def replace(file_path, old_str, new_str):  
      try:  
        f = open(file_path,'r+')  
        all_lines = f.readlines()  
        f.seek(0)  
        f.truncate()  
        for line in all_lines:  
          line = line.replace(old_str, new_str)  
          f.write(line)  
        f.close()  
      except Exception,e:  
        print e  
      
    if __name__ == "__main__":  
      if len(sys.argv) < 4:  
        print "need 3 params"  
        sys.exit(1)  
      file_name = sys.argv[1]  
      src_str = sys.argv[2]  
      dst_str = sys.argv[3]  
      replace(file_name, src_str, dst_str)