摘要：
关于字典： dic.kesy() 获取key dic.values() 获取valuerecommendations改进：persons=prefs.keys() for person in persons: prefs[person]['checked']=0 sims={} for person1 in persons: prefs[person1]['checked']=1 for person2 in persons: if prefs[person2]['checked']==1:continue ... 阅读全文
