e-paper image display

#!/usr/bin/python
# -*- coding:utf-8 -*-

import epd2in13
from PIL import Image,ImageDraw,ImageFont
import traceback
import random
import os

try:
    epd = epd2in13.EPD()
    epd.init(epd.FULL_UPDATE)
    epd.Clear(0xFF)

    # Assign image
    image = Image.new('1', (epd2in13.EPD_HEIGHT, epd2in13.EPD_WIDTH), 255)  # 255: clear the frame

    pics = ['donald.bmp','finn.bmp','spirited.bmp','homer.bmp','link.bmp','justice.bmp','carter.bmp','miles.bmp','mario.bmp','major.bmp']
    choice = random.randint(0,len(pics)-1)
    choiceMaking = 0

    save_state = open("pic_choices.tmp", "a+")
    lines = save_state.readlines()
    lines = [int(i) for i in lines]

    if len(lines) == len(pics):
        print("full")
        save_state.close()
        os.remove("pic_choices.tmp")
        save_state = open("pic_choices.tmp", "a+")
        save_state.write(str(choice) + "/n")
        choiceMaking = 1
        lines = save_state.readlines()
    elif len(lines) == 0:
        save_state.write(str(choice) + "/n")
        choiceMaking = 1
        lines = save_state.readlines()

    while choiceMaking == 0:
        if choice in lines:
            print("duplicate found; choosing another...")
            choice = random.randint(0,len(pics)-1)
        else:
            choiceMaking = 1

    save_state.write(str(choice) + "\n")

    save_state.close()

    image = Image.open(pics[choice])
    epd.display(epd.getbuffer(image))

except:
    print('traceback.format_exc():\n%s',traceback.format_exc())
    exit()