如何将具有重复索引的堆叠列转换为具有pandas的多个唯一列？

import pandas as pd

data = {'Index': ['A', 'A', 'B', 'B', 'C', 'C'],
        'Column1': [1, 2, 3, 4, 5, 6],
        'Column2': [7, 8, 9, 10, 11, 12]}

df = pd.DataFrame(data)

  Index  Column1  Column2
0     A        1        7
1     A        2        8
2     B        3        9
3     B        4       10
4     C        5       11
5     C        6       12

df_pivot = pd.pivot_table(df, index='Index', columns=df.groupby('Index').cumcount(), values=['Column1', 'Column2'])

      Column1       Column2      
            0    1       0     1
Index                           
A           1  2.0     7.0   8.0
B           3  4.0     9.0  10.0
C           5  6.0    11.0  12.0