ok after reading a few tutorials i think i know enough to write my  
program
here it  is
not commented yet though sorry:

import curses
from time import sleep
scr=vurses.initscr()
population=0
seconds=0
try:
        scr.nodelay(1)
        scr.leaveok(0)
        max_y, max_x = scr.getmaxyx()
        while scr.getch()== -1:
        sleep(1)
        seconds=seconds+1
        population=population+2.5
        scr.addstr(0,0,"seconds:",seconds")  # i would like to get this  
bottom left but didn't know how
        scr.sddch(1,0,population) # here is ware i think I'm having problems  
also would like this to be centered
        scr.clear()
        scr.refresh()
finaly:
        curses.endwin()




but i get the error:

traceback (most recent call last):
  file "population.py", line 15, in <module>
        scr.addch(1,0,population)
TypeError: argument 1 or 3 must be a ch or an int



thank you
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