pd.merge(df2,df1,how='left')#通过how,指定连接方式data2 key data100a011b121b232cNaN# 3.多键连接时将连接键组成列表传入,例:pd.merge(df1,df2,on=['key1','key2']right=DataFrame({'key1':['foo','foo','bar','bar'],'key2':['one','one','one','two'],'lval':[4,5,6,7]})...
python neural-network attributeerror 1个回答 0投票 问题在于 concat 不是DataFrame 实例方法,而是 pandas 类方法。正确的使用方法是这样的: SearchResultsData = pd.concat([SearchResultsData, pd.DataFrame(data=[[TrialNumber, str(batch_size_trial)+'-'+str(epochs_trial), 100-MAPE]], columns=['...