def count_char(text, char):
    count = 0
    for c in text:
        if c == char:
            count += 1
    return count


# This gives the users an option to enter the name of the file that they want opened
# filename = input("Enter a filename: ")

# This defines the filename
filename = 'Sonnets.txt'
with open(filename) as f:
    text = f.read()

for char in "abcdefghijklmnopqrstuvwxyz":
    perc = 1 * count_char(text, char)
    print("{0} - {1}".format(char, round(perc, 2)))