aoc2020/4/2.py

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2020-12-09 09:26:04 +01:00
def validate_int(value, mi, ma):
value = int(value)
return mi <= value <= ma
def validate_height(value):
v = int(value[:-2])
t = value[-2:]
if (t == "cm" and 150<=v<=193) or (t == "in" and 59<=v<=76):
return True
return False
def validate_hex(h):
return h[0] == "#" and len(h[1:]) == 6 and is_int(h[1:], base=16)
def is_int(x, base=10):
try:
int(x, base=base)
except ValueError:
return False
return True
validators = {
'byr': lambda x: validate_int(x, 1920, 2002),
'iyr': lambda x: validate_int(x, 2010, 2020),
'eyr': lambda x: validate_int(x, 2020, 2030),
'hgt': lambda x: validate_height(x),
'hcl': lambda x: validate_hex(x),
'ecl': lambda x: x in ['amb', 'blu', 'brn', 'gry', 'grn', 'hzl', 'oth'],
'pid': lambda x: len(x) == 9 and is_int(x)
}
def validate(entry, required_fields):
for field in required_fields:
if field not in entry or not validators[field](entry[field]):
return False
return True
entries = [{}]
index = 0
with open("input") as f:
for line in f:
line = line.strip()
if not line:
entries.append({})
index = index + 1
else:
for entry in line.split(" "):
key, value = entry.split(":")
entries[index][key] = value
required = ['byr', 'iyr', 'eyr', 'hgt', 'hcl', 'ecl', 'pid']
print(list(map(lambda x: validate(x, required), entries)).count(True))