如何在列表中拆分句子?

我试图创建一个函数来计算任何给定句子中的单词数量和单词的平均长度。我似乎无法将字符串拆分为两个句子放入列表中,假设句子有句号并结束句子。

• 问号和感叹号应替换为句号,以被识别为列表中的新句子。
• 例如: "Haven't you eaten 8 oranges today? I don't know if you did." 将是: ["Haven't you eaten 8 oranges today", "I don't know if you did"]
• 本例的平均长度为44/12=3.6

def word_length_list(text):
    text = text.replace('--',' ')

    for p in string.punctuation + "‘’”“":
        text = text.replace(p,'')

    text = text.lower()
    words = text.split(".")
    word_length = []
    print(words)

    for i in words:
        count = 0
        for j in i:
            count = count + 1
        word_length.append(count)
    
    return(word_length)

testing1 = word_length_list("Haven't you eaten 8 oranges today? I don't know if you did.")
print(sum(testing1)/len(testing1))