Python实现字典去除重复的方法示例

#!/usr/bin/env python# encoding: utf-8#字典去重小代码import sysimport osimport platformtry:  pass except:  print '''you have something wrong this is a simple jiaoben '''  sys.exit()why = 'why.txt'for i in xrange(len(sys.argv)):  if(i>=1):    other = sys.argv[i]    if os.path.exists(other):      pass    else:      print other + ' file not find'      sys.exit()    if 'Windows' in platform.system():      os.system("type "+other+" >> "+why)    else:      os.system("cat "+other+" >> "+why)yuan = open('why.txt','r')dirc = open('whynot.txt','w')for line in set(yuan.readlines()):  if line == '' or line == '/r/n':    pass  else:    dirc.writelines(line)