python - 用户输入中使用了数组 A 和数组 B 中的多少个单词？

Question

这是一个我需要帮助的程序

   A = ["having", "had", "is"]
   B = ["will", "would", "should"]

   sentence = input("Enter a sentence") #E.g. 'I will be having it in the future'

   if A in sentence:
      ...

   elif B in sentence:
      ...

这里我需要知道句子中使用了数组 A 和数组 B 中的多少个单词。

这里的输出应该是:
句子中有1个A词和1个B词

你能帮帮我吗？

Answer 1

一个相当有效的方法是将 A、B 和句子放入集合中并找到它们的交集的长度。例如:

A = set(["having", "had", "is"])
B = set(["will", "would", "should"])

sentence = 'I will be having it in the future'
S = set(sentence.split())

A_words = A.intersection(S)
B_words = B.intersection(S)

print(f'There is {len(A_words)} word from A and {len(B_words)} word from B in the sentence')

输出:

There is 1 word from A and 1 word from B in the sentence