import?sys
import?random
def?regeneration（filein?percent?=?0.14）:
????f?=?open（filein）
????ftrain?=?open（filein?+?“.train“?‘w‘）
????ftest?=?open（?filein?+?“.test“?‘w‘）
????fw?=?ftrain
????items?=?{}
????users?=?{}
????flag?=?True
????maxuid?=?0
????for?line?in?f.xreadlines（）:
????????uid?mid?rating?timestamp?=?line.split（“::“）
????????newmid?=?items.get（mid）
????????newuid?=?users.get（uid）
????????if?newmid?==?None:
????????????newmid?=?len（items）?+?1
????????????items[mid]?=??newmid
????????if?newuid?==?None:
????????????newuid?=?len（users）?+?1
????????????users[uid]?=?newuid
????????if?newuid?????????????flag?=?False
????????if?random.random（）?<=?percent:
????????????fw?=?ftest
????????else:
????????????fw?=?ftrain
????????fw.write（“%d%d%s%s“?%（newuid?newmid?rating?timestamp））?##?timestamp?has?a?‘\n‘
????print?“USERID?ORDER?BY?ASC?:?“?flag
????fw.close（）
????f.close（）

if?__name__?==?‘__main__‘:
##????regeneration（sys.argv[1]?float（sys.argv[2]））
????regeneration（r“E:\data\ml-10m\ml-10M100K\ratings.dat“）

?屬性????????????大小?????日期????時間???名稱
-----------?---------??----------?-----??----
?????目錄???????????0??2011-12-26?16:53??dami\
?????文件?????????393??2011-12-26?16:53??dami\.classpath
?????文件?????????556??2011-12-23?12:28??dami\.project
?????目錄???????????0??2011-12-23?12:28??dami\.settings\
?????文件??????????88??2011-12-22?16:18??dami\.settings\org.eclipse.core.resources.prefs
?????文件?????????695??2011-12-23?12:38??dami\.settings\org.eclipse.jdt.core.prefs
?????文件?????????121??2011-12-23?12:28??dami\.settings\org.eclipse.m2e.core.prefs
?????目錄???????????0??2012-01-04?20:16??dami\bin\
?????目錄???????????0??2011-12-19?15:23??dami\bin\org\
?????目錄???????????0??2011-12-21?20:24??dami\bin\org\lgn\
?????目錄???????????0??2011-12-21?20:24??dami\bin\org\lgn\recommend\
?????目錄???????????0??2011-12-22?10:02??dami\bin\org\lgn\recommend\stars\
?????目錄???????????0??2011-12-23?10:10??dami\bin\org\lgn\recommend\stars\common\
?????文件?????????665??2011-12-22?16:18??dami\bin\org\lgn\recommend\stars\common\Constants.class
?????文件????????2344??2011-12-23?10:10??dami\bin\org\lgn\recommend\stars\common\DataSet$FileDataSet.class
?????文件????????2591??2011-12-23?10:10??dami\bin\org\lgn\recommend\stars\common\DataSet$MemDataSet.class
?????文件????????1006??2011-12-23?10:10??dami\bin\org\lgn\recommend\stars\common\DataSet.class
?????文件????????1250??2011-12-22?16:18??dami\bin\org\lgn\recommend\stars\common\Evaluator.class
?????文件?????????370??2011-12-22?16:18??dami\bin\org\lgn\recommend\stars\common\Model.class
?????文件?????????844??2011-12-23?09:38??dami\bin\org\lgn\recommend\stars\common\RatingInfo.class
?????文件????????1871??2011-12-22?16:18??dami\bin\org\lgn\recommend\stars\common\Utilities.class
?????目錄???????????0??2011-12-22?15:49??dami\bin\org\lgn\recommend\stars\model\
?????文件????????4051??2011-12-22?19:22??dami\bin\org\lgn\recommend\stars\model\RSVDModel.class
?????文件????????5521??2011-12-22?19:29??dami\bin\org\lgn\recommend\stars\model\SimpleFactorizationModel.class
?????文件????????5380??2011-12-22?17:03??dami\bin\org\lgn\recommend\stars\model\SimpleFactorizationModel2.class
?????目錄???????????0??2011-12-22?16:36??dami\bin\org\lgn\recommend\stars\test\
?????文件????????1940??2011-12-22?16:41??dami\bin\org\lgn\recommend\stars\test\TestRSVDModel.class
?????文件????????1963??2011-12-22?19:26??dami\bin\org\lgn\recommend\stars\test\TestSimpleModel.class
?????文件????????2051??2011-12-23?11:05??dami\bin\org\lgn\recommend\stars\test\TestSimpleModel2.class
?????目錄???????????0??2011-12-23?12:30??dami\conf\
?????文件?????????351??2011-12-23?12:28??dami\pom.xml
............此處省略76個文件信息