Discussion on: AoC Day 4: Repose Record

import re
from collections import Counter

with open('input.txt', 'r') as f:
    data = []
    for line in f:
       date = line[line.find("[")+1:line.find("]")]
       action = line.split("] ")[1].strip()
       data.append((date, action,))
    data = sorted(data, key=lambda i: i[0])

guards = {}
for time, action in data:
    time = int(time[-2:])
    if "Guard" in action:
        _id = re.findall(r'\d+', action)[0]
        if not _id in guards:
            guards[_id] = {'length': 0, 'minutes': []}
    elif action == "falls asleep":
        start = time
    else:
        guards[_id]['length'] += time - start
        guards[_id]['minutes'] += list(range(start, time))

sleep_longest = max(guards.items(),key=lambda guard: guard[1]['length'])
minutes = sleep_longest[1]['minutes']
print(Counter(minutes).most_common(1)[0][0] * int(sleep_longest[0]))

import re
from collections import Counter

with open('input.txt', 'r') as f:
    data = []
    for line in f:
       date = line[line.find("[")+1:line.find("]")]
       action = line.split("] ")[1].strip()
       data.append((date, action,))
    data = sorted(data, key=lambda i: i[0])

guards = {}
for time, action in data:
    time = int(time[-2:])
    if "Guard" in action:
        _id = re.findall(r'\d+', action)[0]
        if not _id in guards:
            guards[_id] = []
    elif action == "falls asleep":
        start = time
    else:
        guards[_id] += list(range(start, time))

max_count = 0
solution = 0
for guard, minutes in guards.items():
    if minutes:
        most_frequent = Counter(minutes).most_common(1)[0]
        if most_frequent[1] > max_count:
            max_count = most_frequent[1]
            solution = int(guard) * most_frequent[0]
print(solution)