Day 3 part 1

import re
with open("input") as file:
    data = file.read().splitlines()
num = []
sym = []
part1 = 0

for line in data:
    num.append([(int(m.group()),m.start(), m.end() - 1) for m in re.finditer(r'(\d+)', line)])
    sym.append([m.start() for m in re.finditer(r'[^\d.]', line)])

for i, x in enumerate(num):
    for n, s, e in x:
        if ((s - 1 in sym[i]) or (e + 1 in sym[i]) or
                (i != len(num) - 1 and any(x in sym[i + 1] for x in range(s - 1, e + 2))) or
                (i != 0 and any(x in sym[i - 1] for x in range(s - 1, e + 2)))):
            part1 += n

print(part1)