[WIP] Solution to problem 4 part 2 in Python

src/P4.py

@@ -83,5 +83,165 @@ def part_1() -> None:
     print(f"There are {valid_passports} valid passports")
 
 
+# --- Part Two ---
+
+# The line is moving more quickly now, but you overhear airport security
+# talking about how passports with invalid data are getting through. Better add
+# some data validation, quick!
+
+# You can continue to ignore the cid field, but each other field has strict
+# rules about what values are valid for automatic validation:
+
+#     byr (Birth Year) - four digits; at least 1920 and at most 2002.
+#     iyr (Issue Year) - four digits; at least 2010 and at most 2020.
+#     eyr (Expiration Year) - four digits; at least 2020 and at most 2030.
+#     hgt (Height) - a number followed by either cm or in:
+#         If cm, the number must be at least 150 and at most 193.
+#         If in, the number must be at least 59 and at most 76.
+#     hcl (Hair Color) - a # followed by exactly six characters 0-9 or a-f.
+#     ecl (Eye Color) - exactly one of: amb blu brn gry grn hzl oth.
+#     pid (Passport ID) - a nine-digit number, including leading zeroes.
+#     cid (Country ID) - ignored, missing or not.
+
+# Your job is to count the passports where all required fields are both present
+# and valid according to the above rules. Here are some example values:
+
+# byr valid:   2002
+# byr invalid: 2003
+
+# hgt valid:   60in
+# hgt valid:   190cm
+# hgt invalid: 190in
+# hgt invalid: 190
+
+# hcl valid:   #123abc
+# hcl invalid: #123abz
+# hcl invalid: 123abc
+
+# ecl valid:   brn
+# ecl invalid: wat
+
+# pid valid:   000000001
+# pid invalid: 0123456789
+
+# Here are some invalid passports:
+
+# eyr:1972 cid:100
+# hcl:#18171d ecl:amb hgt:170 pid:186cm iyr:2018 byr:1926
+
+# iyr:2019
+# hcl:#602927 eyr:1967 hgt:170cm
+# ecl:grn pid:012533040 byr:1946
+
+# hcl:dab227 iyr:2012
+# ecl:brn hgt:182cm pid:021572410 eyr:2020 byr:1992 cid:277
+
+# hgt:59cm ecl:zzz
+# eyr:2038 hcl:74454a iyr:2023
+# pid:3556412378 byr:2007
+
+# Here are some valid passports:
+
+# pid:087499704 hgt:74in ecl:grn iyr:2012 eyr:2030 byr:1980
+# hcl:#623a2f
+
+# eyr:2029 ecl:blu cid:129 byr:1989
+# iyr:2014 pid:896056539 hcl:#a97842 hgt:165cm
+
+# hcl:#888785
+# hgt:164cm byr:2001 iyr:2015 cid:88
+# pid:545766238 ecl:hzl
+# eyr:2022
+
+# iyr:2010 hgt:158cm hcl:#b6652a ecl:blu byr:1944 eyr:2021 pid:093154719
+
+# Count the number of valid passports - those that have all required fields and
+# valid values. Continue to treat cid as optional. In your batch file, how many
+# passports are valid?
+
+
+# def is_valid(field: str) -> bool:
+#     # print(f"checking {field}")
+#     if field[:3] == "byr" and len(field[4:]) == 4:
+#         # print("byr?")
+#         if int(field[4:]) > 1920 or int(field[4:]) < 2002:
+#             # print("passed")
+#             return True
+#     if field[:3] == "iyr" and len(field[4:]) == 4:
+#         # print("iyr?")
+#         if int(field[4:]) > 2010 or int(field[4:]) < 2020:
+#             # print("passed")
+#             return True
+#     if field[:3] == "eyr" and len(field[4:]) == 4:
+#         # print("eyr?")
+#         if int(field[4:]) > 2020 or int(field[4:]) < 2030:
+#             # print("passed")
+#             return True
+#     if (
+#         field[:3] == "hgt"
+#         and len(field[4:-2]) > 0
+#         and type(int(field[4:-2])) == int
+#     ):
+#         # print("hgt?")
+#         if field[-2:] == "cm":
+#             # print("cm?")
+#             if int(field[4:-2]) > 150 or int(field[4:-2]) < 193:
+#                 # print("passed")
+#                 return True
+#         if field[-2:] == "in":
+#             # print("in?")
+#             if int(field[4:-2]) > 59 or int(field[4:-2]) < 76:
+#                 # print("passed")
+#                 return True
+#     if field[:3] == "hcl" and len(field[4:]) == 7:
+#         # print("hcl?")
+#         valid_char = 0
+#         for c in field[5:]:
+#             if c in "0123456789abcdef":
+#                 valid_char += 1
+#             if valid_char == 6:
+#                 # print("passed")
+#                 return True
+#     if field[:3] == "ecl":
+#         # print("ecl?")
+#         if field[4:] in ["amb", "blu", "brn", "gry", "grn", "hzl", "oth"]:
+#             # print("passed")
+#             return True
+#     if field[:3] == "pid":
+#         # print("pid?")
+#         if len(field[4:]) == 9 and field[4:].isdigit():
+#             # print("passed")
+#             return True
+
+
+# def part_2() -> None:
+#     valid_passports = 0
+#     for passport in passports:
+#         if len(passport) > 7:
+#             # print(f"checking passport: {passport}")
+#             valid_fields = 0
+#             for field in passport:
+#                 if is_valid(field):
+#                     valid_fields += 1
+#             if valid_fields > 7:
+#                 # print("passed")
+#                 valid_passports += 1
+#         if len(passport) == 7:
+#             # print(f"checking passport: {passport}")
+#             valid_fields = 0
+#             for field in passport:
+#                 if is_valid(field):
+#                     valid_fields += 1
+#                 if "cid" in field:
+#                     pass
+#             if valid_fields == 7:
+#                 # print("valid passport")
+#                 valid_passports += 1
+#         # break
+
+#     print(f"There are {valid_passports} valid passports")
+
+
 if __name__ == "__main__":
     part_1()
+#    part_2()