Off topic:csv file, columns issue

Question

[jim.paredes]

Hello, I have a problem with a .csv file from Copy number data. The original looks like this:

                  genes               Log2

              PIK3CA,TET2          -0.35

              MLH2,NRAS            0.54

And, what I need is:

genes Log2

PIK3CA -0.35

TET2 -0.35

MLH2 0.54

NRAS 0.54

I have tried many things by now, and they have not been successful. I use Linux, Ubuntu V 16.04. I would appreciate if you could help me with an R or Python script, but, by now, any solution would be acceptable :D Thank you