import re

pattern = '\d'
cmp = re.compile(pattern)

# extremely lazy, of the ungood kind
datapath = 'data'
lines = open(datapath, 'r').read().split('\n')
candidates = []
values = []
for l in lines:
    if l != '':
        r = cmp.findall(l)
        candidates.append(r)
        values.append(int(''.join([r[0], r[-1]])))

print(candidates)
print(values)
print(sum(values))

changes:

mapping = {...} # name/int pairs
pattern = f'(?=(\d|{"|".join(mapping.keys())}))'
lines = open(datapath, 'r').read().split('\n').remove('')
values = []
for l in lines:
    r = cmp.findall(l)
    equivs = [str(mapping.get(x, x)) for x in r]
    head, tail = [equivs[0], equivs[-1]]
    values.append(int(f"{head}{tail}"))
print(sum(values))