Python turtle: How to change icons

[qrious]

Hello All, 

I would like to change two graphical icons related to turtle graphics using Python:

a) One that shows up at the top left corner of the canvas window as in below. I believe this is coming from tk itself.

https://s22.postimg.org/tkjaxmh41/image.png 

b) The icon on the desktop as in below (in Windows): 

https://s13.postimg.org/n7ol0mdpz/icon.png 

Can this be done from within python code itself?

Thanks very much.