Q:

how to delete text to end of line with curses

How how to delete text to end of line ?
stdscr.addstr(5, 5, "Egestas Curabitur Phasellus magnis")

result screen: Egestas Curabitur Phasellus magnis # OK
stdscr.addstr(5, 5, "Elit metus")

result screen: Elit metusrabitur Phasellus magnis # Problem

A:

To delete to the EOL (End Of Line) use window.clrtoeol():
Example:
import curses

window = curses.initscr()
window.clrtoeol()
window.refresh()

I really recommend the use of the great urwid for any console/TUI programming however.
Update: Bhargav Rao is right however; you have to call window.refresh() explicitly:

Accordingly, curses requires that you explicitly tell it to redraw
  windows, using the refresh() method of window objects. In practice,
  this doesn’t really complicate programming with curses much. Most
  programs go into a flurry of activity, and then pause waiting for a
  keypress or some other action on the part of the user. All you have to
  do is to be sure that the screen has been redrawn before pausing to
  wait for user input, by simply calling stdscr.refresh() or the
  refresh() method of some other relevant window.

