摘要： def has_lucky_number(nums): return any([num % 7 == 0 for num in nums]) def menu_is_boring(meals): """Given a list of meals served over some period of time, return True if the same mea... 阅读全文

摘要： df = reviews.loc[:99,['country','variety']] or df = reviews.loc[[1,2,3,4],['country','variety']]df = reviews.loc[[0,1,10,100],['country','province','region_1','region_2']] 两颜色不能互换，必须index在前iloc index... 阅读全文