Added comments in Python and Rust code.

python/qrcodegen-demo.py

@@ -41,6 +41,8 @@ def do_basic_demo():
 	"""Creates a single QR Code, then prints it to the console."""
 	text = u"Hello, world!"               # User-supplied Unicode text
 	errcorlvl = qrcodegen.QrCode.Ecc.LOW  # Error correction level
+	
+	# Make and print the QR Code symbol
 	qr = qrcodegen.QrCode.encode_text(text, errcorlvl)
 	print_qr(qr)
 	print(qr.to_svg_str(4))

python/qrcodegen.py

@@ -790,7 +790,7 @@ class _ReedSolomonGenerator(object):
 		# drop the highest term, and store the rest of the coefficients in order of descending powers.
 		# Note that r = 0x02, which is a generator element of this field GF(2^8/0x11D).
 		root = 1
-		for _ in range(degree):
+		for _ in range(degree):  # Unused variable i
 			# Multiply the current product by (x - r^i)
 			for j in range(degree):
 				self.coefficients[j] = _ReedSolomonGenerator._multiply(self.coefficients[j], root)