#!/usr/bin/env python3
import curses
import sys

class Subwin():
  def __init__(self, screen, size_lines, size_col):
    self.screen = screen
    self.win = screen.subwin(size_lines, size_col, 1, 1)

  def test(self):
    y_max, x_max = self.win.getmaxyx()
    for y in range(y_max):
      for x in range(x_max):
        try:
          self.win.addch(y, x, '*')
        except curses.error:
          self.screen.addstr(6, 0, 'Exception on Line: {} Column: {}'.format(y+1, x+1))
          self.screen.getch()

scr = curses.initscr()

w = Subwin(scr, 5, 11)
w.test()
w.screen.refresh()

curses.endwin()