Pandas —— merge( )合併

merge( )合併須要指定鏈接鍵。web 多對一的合併操做 on參數 指明單個鏈接鍵 In [5]: df1=pd.DataFrame({'key':['b','b','a','a','b','a','c'],'data1':range(7)}) In [6]: df2=pd.DataFrame({'key':['a','b','d'],'data2':range(3)}) In [7]:

>>阅读原文<<