python - 如何对 list.count() 的结果求和

Question

我正在尝试总结字符串中元音的数量。如何计算计数结果的总和？

def count_vowels(string):
    vowel = 'aeiou'
    for i in list(vowel):
        if i in list(string):
                print(string.count(i))

count_vowels('abcod') # 2
count_vowels('coliioor') # 5
count_vowels('colour') #3

当前输出:

1 first word
1 first word
2 second word
3 second word
2 third word
1 third word

Answer 1

您可以使用sum() 函数:

def count_vowels(s):
    return sum(ch in 'aeiou' for ch in s)

print(count_vowels('abcod')) # 2
print(count_vowels('coliioor')) # 5
print(count_vowels('colour')) #3

打印:

2
5
3