Add code for 2015 advent that I did historically.

day_6/part_2.py

@@ -0,0 +1,56 @@
+import re
+
+height = 1000
+width = 1000
+
+lights = []
+
+for row in range(height):
+	lights.append([])
+	for _ in range(width):
+		lights[row].append(0)
+
+pattern = r"^(?P<type>toggle|turn on|turn off) (?P<coord1y>\d+),(?P<coord1x>\d+)[\sA-Za-z]+(?P<coord2y>\d+),(?P<coord2x>\d+)$"
+
+
+
+def light_range(coord1x, coord1y, coord2x, coord2y):
+	coord1x = int(coord1x)
+	coord1y = int(coord1y)
+	coord2x = int(coord2x)
+	coord2y = int(coord2y)
+	for row in range(coord1y, coord2y + 1):
+		for col in range(coord1x, coord2x + 1):
+			yield (row, col)
+
+
+
+data = open("input", "r")
+for instruction in data:
+
+	# Parse instruction
+	match = re.match(pattern, instruction)
+	instruction_type = match.group("type")
+
+	coordinate_generator = light_range(
+		match.group("coord1x"), match.group("coord1y"),
+		match.group("coord2x"), match.group("coord2y")
+	)
+
+	for coord in coordinate_generator:
+		if instruction_type == "toggle":
+			lights[coord[0]][coord[1]] += 2
+		elif instruction_type == "turn on":
+			lights[coord[0]][coord[1]] += 1
+		elif instruction_type == "turn off":
+			if lights[coord[0]][coord[1]] - 1 >= 0:
+				lights[coord[0]][coord[1]] -= 1
+		else:
+			raise Exception(f"Input Error: Invalid instruction: \"{instruction_type}\"")
+
+brightness = 0
+for row in lights:
+	for light in row:
+		brightness += light
+
+print(f"Total Brightness: {brightness}")