python 高效去重复 支持GB级别大文件的示例代码

#coding=utf-8 import sys, re, os def getDictList(dict):  regx = '''[/w/~`/!/@/#/$/%/^/&/*/(/)/_/-/+/=/[/]/{/}/:/;/,/.///</>/?]+'''  with open(dict) as f:    data = f.read()    return re.findall(regx, data) def rmdp(dictList):  return list(set(dictList)) def fileSave(dictRmdp, out):  with open(out, 'a') as f:    for line in dictRmdp:      f.write(line + '/n') def main():  try:    dict = sys.argv[1].strip()    out = sys.argv[2].strip()  except Exception, e:    print 'error:', e    me = os.path.basename(__file__)    print 'usage: %s <input> <output>' %me    print 'example: %s dict.txt dict_rmdp.txt' %me    exit()   dictList = getDictList(dict)  dictRmdp = rmdp(dictList)  fileSave(dictRmdp, out)   if __name__ == '__main__':  main()