How to colorize a word with curses while typing?

Question

i'm new to curses library, and i am trying to colorize the stdin but haven't done yet. I wrote the following codes but they didn't work as i wish, can anyone help me to show how to colorize the stdin?

#!/usr/bin/env python3
# -*- coding: utf-8 -*-

import curses

stdscr = curses.initscr()
curses.start_color()
curses.init_pair(1, curses.COLOR_RED, curses.COLOR_BLACK)
stdscr.nodelay(1)

q = 1
x = set()

while q != ord("q"):
    if len(x) == 3:
        stdscr.addstr(0,0, "def", curses.color_pair(1))
    if q == ord("d"):
        x.add("d")
    elif q == ord("e"):
        x.add("e")
    elif q == ord("f"):
        x.add("f")
    q = stdscr.getch()

stdscr.getch()
curses.endwin()

Answer 1

Your problem appears to be the screen-updates. This version puts the updates after the x set is up-to-date:

#!/usr/bin/env python3
# -*- coding: utf-8 -*-

import curses

stdscr = curses.initscr()
curses.start_color()
curses.init_pair(1, curses.COLOR_RED, curses.COLOR_BLACK)
curses.raw()
curses.noecho()

q = -1
x = set()

while q != ord("q"):
    if q >= 0:
        stdscr.addstr(chr(q))
    if q == ord("d"):
        x.add("d")
    elif q == ord("e"):
        x.add("e")
    elif q == ord("f"):
        x.add("f")
    else:
        x = set()
    if len(x) == 3:
        stdscr.addstr("\b\b\bdef", curses.color_pair(1))
        x = set()
    q = stdscr.getch()

stdscr.getch()
curses.endwin()