advent-of-code/2020/solutions/4/python/main.py

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2020-12-04 06:40:52 +01:00
from os.path import join, dirname
import re
def validate_chunk(chunk, extended=False):
parts = re.split(' |\n', chunk.strip())
password = dict(map(lambda p: p.split(":"), parts))
required = ['byr', 'iyr', 'eyr', 'hgt', 'hcl', 'ecl', 'pid']
if not all(item in password.keys() for item in required):
return False
if not extended:
return True
if not 1920 <= int(password['byr']) <= 2002:
return False
if not 2010 <= int(password['iyr']) <= 2020:
return False
if not 2020 <= int(password['eyr']) <= 2030:
return False
tmp = password['hgt']
hgt = int(tmp[:-2])
unit = tmp[-2:]
if not unit in ['cm', 'in']:
return False
if unit == 'cm' and not 150 <= hgt <= 193:
return False
if unit == 'in' and not 59 <= hgt <= 76:
return False
if not re.match(r'^#[\dabcdef]{6}$', password['hcl']):
return False
if not re.match(r'^\d{9}$', password['pid']):
return False
if password['ecl'] not in ['amb', 'blu', 'brn', 'gry', 'grn', 'hzl', 'oth']:
return False
return True
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data = join(dirname(__file__), '../data.txt')
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with open(data) as f:
chunks = re.split('\n\n+', f.read().strip())
total_simple = 0
total_extended = 0
for chunk in chunks:
total_simple += int(validate_chunk(chunk))
total_extended += int(validate_chunk(chunk, extended=True))
print(f'Simple Validation:\t{total_simple}')
print(f'Extended Validation:\t{total_extended}')