I have ported python3 csv module to C# what license could I use for my module? 
Should I distribute my module? 
Should I put PSF copyright in every header of my module?
thanks
You need to pay a copyright lawyer to tell you that. But my guess is that you need to use the PSF license. Note that PSF does not have the copyright to Python source code. They coders do how that copyright translates into you making a C# port is something only a copyright expert can say. Also note that it is likely to vary from country to country.
Copyright sucks.
Ported python3 csv module to C# what license should I use for my module?