Questions about pyscript

[Ricky]

I make a try a pyscript. But there is one thin confuse me. When I use print
statement intent to send something to browse. It doesn't work, while
document.write can make it. What make me confused is what part is controlled
under python(such as flow control, functions, package etc) and which part is
controlled by DHTML(output?).

Could some one give me an over view option of what pyscript is and the
object tree map of pyscript is a plus.

Thanks!