To do as you say, here is a snippet I used:
class StdOutWrapper:
text = ""
def write(self,txt):
self.text += txt
self.text = '\n'.join(self.text.split('\n')[-30:])
def get_text(self,beg,end):
return '\n'.join(self.text.split('\n')[beg:end])
if __name__ == "__main__":
mystdout = StdOutWrapper()
sys.stdout = mystdout
sys.stderr = mystdout
screen = curses.initscr()
curses.noecho()
curses.cbreak()
# do your stuff here
# you can also output mystdout.get_text() in a ncurses widget in runtime
screen.keypad(0)
curses.nocbreak()
curses.echo()
curses.endwin()
sys.stdout = sys.__stdout__
sys.stderr = sys.__stderr__
sys.stdout.write(mystdout.get_text())
The neat thing with that trick, is that you can also output your stdout during ncurse runtime in a widget. Of course the internal representation of StdOutWrapper can be tweaked as you want, to better match your needs.