shithub: zelda3

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functools.cache doesn't exist in Python3.8

--- a/tables/compile_resources.py

+++ b/tables/compile_resources.py

@@ -6,7 +6,7 @@

 import tables

 import compile_music

 import array, hashlib, struct

-from functools import cache

+from util import cache

 import sprite_sheets

 def flatten(xss):

--- a/tables/extract_resources.py

+++ b/tables/extract_resources.py

@@ -2,13 +2,12 @@

 import sys

 import text_compression

 import util

-from util import get_bytes, get_words, get_byte, get_word, get_int8, get_int16

+from util import get_bytes, get_words, get_byte, get_word, get_int8, get_int16, cache

 import tables

 import yaml

 import extract_music

 import os

 import sprite_sheets

-from functools import cache

 def print_map32_to_map16(f):

   for i in range(2218):

--- a/tables/sprite_sheets.py

+++ b/tables/sprite_sheets.py

@@ -1,10 +1,9 @@

 from PIL import Image

 import sprite_sheet_info

 import util

-from util import get_bytes, get_words, get_byte

+from util import get_bytes, get_words, get_byte, cache

 import array

 import tables

-from functools import cache

 def save_as_png(dimensions, data, fname, palette = None):

   img = Image.new('L' if palette == None else 'P', dimensions)

--- a/tables/util.py

+++ b/tables/util.py

@@ -2,7 +2,11 @@

 import sys

 import hashlib

 import os

-from functools import cache

+from functools import lru_cache

+

+def cache(user_function, /):

+  'Simple lightweight unbounded cache.  Sometimes called "memoize".'

+  return lru_cache(maxsize=None)(user_function)

 # Both are common SNES rom extensions. For Zelda3 (NA), they are equivalent files.

 COMMON_ROM_NAMES = ['zelda3.sfc', 'zelda3.smc']