diff --git a/day_7/part_1.py b/day_7/part_1.py
new file mode 100644
index 0000000..4511a8f
--- /dev/null
+++ b/day_7/part_1.py
@@ -0,0 +1,30 @@
+import re
+
+with open("test") as file:
+	rules = file.read().split("\n")
+
+
+bag_colours = {}
+
+
+for rule in rules:
+	container, containing = rule.split(" bags contain ", 1)
+	nested = containing.replace(".", "").split(", ")
+
+	for colour in nested:
+
+		# End iteration if no other bags can be nested internally
+		if colour == "no other bags":
+			break
+
+		print(colour)
+		colour = re.match(r"^[0-9]+ (?P<colour>[A-Za-z ]+) bags?$", colour).group("colour")
+
+		# Can nest other colours inside of the bag
+		if colour not in bag_colours:
+			bag_colours[colour] = [container]
+		else:
+			if container not in bag_colours[colour]:
+				bag_colours[colour].append(container)
+
+print(bag_colours)
\ No newline at end of file