Count_Vowels

'''
PURPOSE: Count the vowels (both uppercase and lowercase) in an entire file.

This program has no user input. The provided main uses the function you will
write as a demo.

HINT: This requires both a loop for going of the lines of text in the file and
a loop to go over the characters within each line.

AUTHOR: Natalie Preiss
'''


def count_vowels(filename):
    """
    Counts and returns the number of vowels in the file with the given name. Since the file could
    be very large, the file must be iterated line-by-line. You cannot use any of the read functions.
    """
    # add function here
    f = open(filename)

    #Our list that will contain the vowels
    vowels = ['a','e','i','o','u']

    #Variable that will count the vowels
    countVowels = 0

    #Read line from the file
    line = f.readline()

    #While there are lines present in the file keep reading
    while line:
        #For each character (in lower case) of line check if it is in our list of vowels
        for character in line:
            if character.lower() in vowels:
                countVowels += 1
        #Read the next line
        line = f.readline()

    #Return the number of vowels
    return countVowels

def main():
    vowel_count = count_vowels('alice.txt')
    print("There are", vowel_count, "in Alice in Wonderland")


if __name__ == "__main__":
    main()