pandas合并数据框

一、列合并

import pandas as pd
A = pd.DataFrame(list(range(5)), columns = ['A'])
B = pd.DataFrame(list(range(5,10)), columns = ['B'])
C = pd.DataFrame(list(range(10,15)), columns = ['C'])
D = pd.DataFrame(list(range(15,20)), columns = ['D'])
A

# 列向合并
pd.concat((A,B),axis = 1)

pd.concat((A,B,C),axis = 1)

二、行合并

# 行向合并
pd.concat((A,B),axis = 0)

pd.concat((A,B,C),axis = 0)

A.append([B,C])