Update and add more tool scripts

tools/sym_comments.py

@@ -2,7 +2,7 @@
 # -*- coding: utf-8 -*-
 
 """
-Usage: python3 sym_comments.py file.asm [pokecrystal.sym] > file_commented.asm
+Usage: python sym_comments.py file.asm [pokecrystal.sym] > file_commented.asm
 
 Comments each label in file.asm with its bank:address from the sym file.
 """
@@ -10,40 +10,43 @@ Comments each label in file.asm with its bank:address from the sym file.
 import sys
 import re
 
-if len(sys.argv) != 2 and len(sys.argv) != 3:
-	print('Usage: %s file.asm [pokecrystal.sym] > file_commented.asm' % sys.argv[0], file=sys.stderr)
+def main():
+	if len(sys.argv) not in {2, 3}:
+		print(f'Usage: {sys.argv[0]} file.asm [pokecrystal.sym] > file_commented.asm', file=sys.stderr)
+		sys.exit(1)
 
-wram_name = sys.argv[1]
-sym_name = sys.argv[2] if len(sys.argv) == 3 else 'pokecrystal.sym'
+	wram_name = sys.argv[1]
+	sym_name = sys.argv[2] if len(sys.argv) == 3 else 'pokecrystal.sym'
 
-sym_format = r'[A-Za-z_][A-Za-z0-9_#@]*'
-sym_def_rx = re.compile(r'(^%s)(:.*)|(^\.%s)(.*)' % (sym_format, sym_format))
+	sym_def_rx = re.compile(r'(^{sym})(:.*)|(^\.{sym})(.*)'.format(sym=r'[A-Za-z_][A-Za-z0-9_#@]*'))
 
-sym_addrs = {}
-with open(sym_name, 'r', encoding='utf-8') as f:
-	for line in f:
-		line = line.split(';', 1)[0].rstrip()
-		parts = line.split(' ', 1)
-		if len(parts) != 2:
-			continue
-		addr, sym = parts
-		sym_addrs[sym] = addr
+	sym_addrs = {}
+	with open(sym_name, 'r', encoding='utf-8') as file:
+		for line in file:
+			line = line.split(';', 1)[0].rstrip()
+			parts = line.split(' ', 1)
+			if len(parts) != 2:
+				continue
+			addr, sym = parts
+			sym_addrs[sym] = addr
 
-with open(wram_name, 'r', encoding='utf-8') as f:
-	cur_label = None
-	for line in f:
-		line = line.rstrip()
-		m = re.match(sym_def_rx, line)
-		if m:
-			sym, rest = m.group(1), m.group(2)
-			if sym is None and rest is None:
-				sym, rest = m.group(3), m.group(4)
-			key = sym
-			if not sym.startswith('.'):
-				cur_label = sym
-			elif cur_label:
-				key = cur_label + sym
-			if key in sym_addrs:
-				addr = sym_addrs[key]
-				line = sym + rest + ' ; ' + addr
-		print(line)
+	with open(wram_name, 'r', encoding='utf-8') as file:
+		cur_label = None
+		for line in file:
+			line = line.rstrip()
+			if (m = re.match(sym_def_rx, line)):
+				sym, rest = m.group(1), m.group(2)
+				if sym is None and rest is None:
+					sym, rest = m.group(3), m.group(4)
+				key = sym
+				if not sym.startswith('.'):
+					cur_label = sym
+				elif cur_label:
+					key = cur_label + sym
+				if key in sym_addrs:
+					addr = sym_addrs[key]
+					line = sym + rest + ' ; ' + addr
+			print(line)
+
+if __name__ == '__main__':
+	main()