Set font path relative to the sf_examples package so code can be inst…

…antiated from arbitrary current working directories

sf_examples/nethack/utils/wrappers/screen_image.py

@@ -21,6 +21,7 @@
 
 import os
 from typing import Any, SupportsFloat
+import importlib.resources
 
 import cv2
 import gym
@@ -30,8 +31,7 @@
 from numba import njit
 from PIL import Image, ImageDraw, ImageFont
 
-SMALL_FONT_PATH = os.path.abspath("sf_examples/nethack/nethack_render_utils/Hack-Regular.ttf")
-
+SMALL_FONT_PATH = importlib.resources.files("sf_examples") / "nethack/nethack_render_utils/Hack-Regular.ttf"
 
 # Mapping of 0-15 colors used.
 # Taken from bottom image here. It seems about right