with open('ages.txt') as f: 
    print(f.read())

filnavn = 'ages.txt'

with open(filnavn) as f:
    r = f.readlines()
    print(r)

with open(filnavn) as f:
    for line in f:
        #line = line.strip()
        print(line)    


s = '   Velkommen, til, INF100  \n'

print(s)
print(s.strip())

s = s.strip()
print(s.split(','))


names = []
sum_ages = 0
with open('ages.txt') as f:
    for line in f:
        line = line.strip()
        navn, alder = line.split(',')
        names.append(navn)
        sum_ages += int(alder)

print(f'all the people: {names}')
print(f'average ages: {sum_ages / len(names)}')