aoc20-04.py

from advent import Input
import re

input = Input(day = 4).lines()

ans = 0
keys = set()

for ln in input:
	if ln == "":
		if "byr" in keys and "iyr" in keys and "eyr" in keys and "hgt" in keys and "hcl" in keys and "ecl" in keys and "pid" in keys:
			ans += 1
		keys = set()
	else:
		for part in ln.split(" "):
			key = part.split(":")[0]
			value = part.split(":")[1]

			ok = False

			if key == "byr":
				if 1920 <= int(value) <= 2020: ok = True
			elif key == "iyr":
				if 2010 <= int(value) <= 2020: ok = True
			elif key == "eyr":
				if 2020 <= int(value) <= 2030: ok = True
			elif key == "eyr":
				if 2020 <= int(value) <= 2030: ok = True
			elif key == "hgt":
				if value[-2:] == "cm" and 150 <= int(value[:-2]) <= 193: ok = True
				if value[-2:] == "in" and 59 <= int(value[:-2]) <= 76: ok = True
			elif key == "hcl":
				if re.compile(r"^#[0-9a-f]{6}$").match(value): ok = True
			elif key == "ecl":
				if value in ["amb", "blu", "brn", "gry", "grn", "hzl", "oth"]:
					ok = True
			elif key == "pid":
				if re.compile(r"^\d{9}$").match(value): ok = True

			if ok:
				keys.add(key)

print(ans)

Note that this fails if the last passport is valid... better lucky than good, I guess 😄