How to rearrange the following pandas dataframe?

Question

I have a dataframe that looks like the following:

  |  A   | B   | C   | D   | tag |
0 |  0.1 | 0.2 | 0.3 | 1.0 | a   |
1 |  0.1 | 0.2 | 0.3 | 1.0 | b   |
2 |  0.1 | 0.2 | 0.3 | 1.0 | c   |

Is there a way to transform it to the following:

tag |  a  |  b  |  c  |
A   | 0.1 | 0.1 | 0.1 |
B   | 0.2 | 0.2 | 0.2 |
C   | 0.3 | 0.3 | 0.3 |
D   | 1.0 | 1.0 | 1.0 |