How to Refresh the Desktop window with python script

[muttu2244 at yahoo.com]

Hi everybody

I have couple of questions,

1) How can i refresh my desktop window(wallpaper), using the python
script, after pasting some data on the desktop.

2) How can i run an exe file from the python

3) How can i get the information of a machine like "computer name",
"mac address", "ip address" and "OS on that system".

Thanks in advance for having given a thought on my questions.

Regards
Yogi