数据合并concat横纵向合并
import pandas as pd#纵向合并:first=pd.DataFrame({‘A’:[‘A0’,‘A1’,‘A2’],‘B’:[‘B0’,‘B1’,‘B2’],‘C’:[‘C0’,‘C1’,‘C2’]})second=pd.DataFrame({‘B’:[‘B0’,‘B1’,‘B2’],‘C’:[‘C0’,‘C1’,‘C2’],‘D’:[‘D0’,‘D1’,‘D2’]}...
