您需要相同
dtype的连接列：
#convert first or second to str or intMergeDat['Motor'] = MergeDat['Motor'].astype(str)#Motor['Motor'] = Motor['Motor'].astype(str)#MergeDat['Motor'] = MergeDat['Motor'].astype(int)Motor['Motor'] = Motor['Motor'].astype(int)
#convert first or second to str or int#MergeDat['Motor'] = MergeDat['Motor'].astype(str)Motor['Motor'] = Motor['Motor'].astype(str)MergeDat['Motor'] = MergeDat['Motor'].astype(int)#Motor['Motor'] = Motor['Motor'].astype(int)MergeDat=MergeDat.merge(Motor,how="left")
