Complete day 4

04/part1

@@ -0,0 +1,18 @@
+#!/usr/bin/python3
+
+required_fields = { "byr", "iyr", "eyr", "hgt", "hcl", "ecl", "pid",}
+
+valid = 0
+with open("input") as fh:
+    all_data = fh.read()
+    passport_strings = all_data.split("\n\n")
+    for ps in passport_strings:
+        fields = ps.split()
+        passport = {}
+        for f in fields:
+            k, v = f.split(":")
+            passport[k] = v
+        if required_fields - set(passport.keys()) == set():
+            valid += 1
+print(valid)
+

04/part2

@@ -0,0 +1,66 @@
+#!/usr/bin/python3
+import re
+
+def byr_valid(s):
+    try:
+        yr = int(s)
+        return 1920 <= yr <= 2002
+    except:
+        return False
+
+def iyr_valid(s):
+    try:
+        yr = int(s)
+        return 2010 <= yr <= 2020
+    except:
+        return False
+
+def eyr_valid(s):
+    try:
+        yr = int(s)
+        return 2020 <= yr <= 2030
+    except:
+        return False
+
+def hgt_valid(s):
+    try:
+        m = re.fullmatch(r"(\d+)(cm|in)", s)
+        if m.group(2) == "cm":
+            return 150 <= int(m.group(1)) <= 193
+        elif m.group(2) == "in":
+            return 59 <= int(m.group(1)) <= 76
+        else:
+            return False
+    except:
+        return False
+
+def hcl_valid(s):
+    return bool(re.fullmatch(r"#[0-9a-f]{6}", s))
+
+def ecl_valid(s):
+    return s in ("amb", "blu", "brn", "gry", "grn", "hzl", "oth")
+
+def pid_valid(s):
+    return bool(re.fullmatch(r"[0-9]{9}", s))
+
+checks = {
+    "byr": byr_valid, "iyr": iyr_valid, "eyr": eyr_valid,
+    "hgt": hgt_valid, "hcl": hcl_valid, "ecl": ecl_valid,
+    "pid": pid_valid,}
+
+valid_count = 0
+with open("input") as fh:
+    all_data = fh.read()
+    passport_strings = all_data.split("\n\n")
+    for ps in passport_strings:
+        fields = ps.split()
+        passport = {}
+        for f in fields:
+            k, v = f.split(":")
+            passport[k] = v
+        is_valid = True
+        for f, c in checks.items():
+            is_valid = is_valid and f in passport and c(passport[f])
+        valid_count += is_valid
+print(valid_count)
+