I am new to python. I would like to copy multiple columns to single column in a excel using python.
And in that single column first heading and then value if the value is not present the that column should not copy.

Example Excel data:

| Column A | Column B | Column C | Column D |
| --- | --- | --- | --- |
| One | Two | Three | Four |
| Five |  | Six | Seven |
| xyz | hjy |  | abc |

Excepted Result:

| Column A | Column B | Column C | Column D | Column E |
| --- | --- | --- | --- | --- |
| One | Two | Three |  | Column A :One, Column B:Two, Column C:Three |
| Five |  | Six | Seven | Column A :Five, Column C:Six, Column D:Seven |
| xyz | hjy |  | abc | Column A :xyz, Column B:hjy, Column D:abc |

[Example and Expected result image](https://i.stack.imgur.com/VOkZZ.png)

Kindly help to resolve the issue.
Thank you.