Add advent code for 2020 days 1-4

day_2/part_1.py

@@ -0,0 +1,18 @@
+with open("input") as file:
+	data = file.read().split("\n")
+
+import re
+
+valid_passwords = 0
+
+
+for password_data in data:
+
+	rule, password = password_data.split(": ")
+	rules = rule.split(" ")
+	min_len, max_len = rules[0].split("-")
+
+	if int(min_len) <= len(re.findall(rules[1], password)) <= int(max_len):
+		valid_passwords += 1
+
+print(valid_passwords)