string scrolling in python with curses

scroll.py

#!/usr/bin/python
import curses
from time import sleep

curses.initscr()

string = "this is a really fun scrolling string "
def scroll(stdscr):
	try:
		curses.curs_set(0)
	except:
		pass
	curses.start_color()
	for i in range(0,curses.COLORS):
			curses.init_pair(i+1,i,0)
	stdscr.bkgd(" ",curses.A_BOLD | curses.color_pair(0))

	display = []
	for x in range(0, 400): 					#blank our display array
		display.append(' ')
	index = 0
	while True:
		columns=stdscr.getmaxyx()[1]			#always update columns in case window resizes
		for x in range(0, columns-1):
			display[x] = display[x+1] 			#shift everything to the left one
		display[columns-1] = string[index]		#add the next char
		index += 1
		if(index >= len(string)): 				#if your index exceeds the string
			index = 0							#reset the string index to zero
		
		temp = ''								#new clear string for printing
		for x in display:
			temp += x
		columns=stdscr.getmaxyx()[1]			#if you try to draw outside of the column, it will crash
		stdscr.addstr(0,0,temp[:columns],curses.color_pair(0))
		stdscr.refresh()
		
		sleep(.09) #scroll speed

if __name__ == '__main__':
	curses.wrapper(scroll)