Words containing Even Number of Vowels in a file

def displ():
    res = ()

    def even_vowels(str1):
        no_vow = 0
        vowels = ('a', 'e', 'i', 'o','u')

        for i in str1:
            if i.lower() in vowels:
                no_vow += 1

        return (no_vow%2 == 0)

    with open("poem.txt") as file:
        L1 = file.readlines()

        for i in L1:
            words = i.split(" ")
            print(words)

            for j in words:
                if even_vowels(j):
                    res += (j,)

    print("\nWords containing Even no. of Vowels :")
    for i in res:
        print(rf"'{i}'", end = " ")
    print("\nNumber of Words : ", len(res))

displ()