返回列表中具有给定元音数量的单词数

def count_vowels(word):
    vowels = 'aeiou'
    count = 0
    for char in word.lower():
        if char in vowels:
            count += 1
    return count

def count_words_with_vowels(word_list, vowel_count):
    word_count = 0
    for word in word_list:
        if count_vowels(word) == vowel_count:
            word_count += 1
    return word_count

# 示例用法
word_list = ['apple', 'banana', 'orange', 'kiwi', 'grape']
vowel_count = 2
result = count_words_with_vowels(word_list, vowel_count)
print(result)  # 输出：2