Python:我的代码没有打印出元音的数量

Question

 def is_vowel (character):

   
    if (character == 'a'or character == 'o' or character == 'u' or character == 'i' or character == 'e'):
    
        return True
    else:
        return False

def count_vowels_iter(string, sentence):
    count = 0

    for character in sentence:
       if (is_vowel(character) == True):
        count==count+1
        return count
count = count_vowels_iter('sentence')
print (count)

有人可以帮助我吗，我是新手。一定有什么东西我没有找到。

Answer 1

首先，count_vowels_iter需要2个参数(string和sentence)，并且在调用函数时您只提供1个。

其次。您的 return 语句需要位于 for 循环完成之后，如下所示:

def count_vowels_iter(string, sentence):
    count = 0

    for character in sentence:
       if (is_vowel(character) == True):
        count=count+1
    return count

count==count+1 应该是 count=count+1 因为您正在分配 count 一个新值，而不是比较它。