DataFrame拼接

import pandas as pd
import numpy as np
# 通过字典创建 DataFrame
data = {'A':['A0', 'A1', 'A2'],
        'B':['B0', 'B1', 'B2'],
        'C': ['C0', 'C1', 'C2'],}
df = pd.DataFrame(data)
df = pd.DataFrame(data, index=['L0', 'L1', 'L2'])
print(df)


df3=pd.DataFrame(np.arange(16).reshape((4,4)),index=['a','b','c','d'],columns=['one','two','three','four'])

df4=pd.DataFrame([6,6,6,6]).T

df4.columns=df3.columns

above=df3.iloc[:1]
below=df3.iloc[1:]

newData = above.append(df4,ignore_index=True).append(below,ignore_index=True)
newData2 = pd.concat([above,df4,below],axis=0,ignore_index = True)
print(newData2)

     A   B   C
L0  A0  B0  C0
L1  A1  B1  C1
L2  A2  B2  C2
   one  two  three  four
0    0    1      2     3
1    6    6      6     6
2    4    5      6     7
3    8    9     10    11
4   12   13     14    15