import string

fname = input('Podaj nazwę pliku: ')
try:
    fhand = open(fname)
except:
    print('Nie można otworzyć pliku:', fname)
    exit()

counts = dict()
for line in fhand:
    line = line.translate(str.maketrans('', '', string.punctuation))
    line = line.lower()
    words = line.split()
    for word in words:
        if word not in counts:
            counts[word] = 1
        else:
            counts[word] += 1

print(counts)