如何比较Python中两个字符串列表中的特定单词数

Question

I need to write a script that takes two sentences as input and verifies if they contains exactly four words that are equal. My code follow doesn't work as I have limited knowledge and I really value your knowledge!

I want to test if there are four distinct words in common.

input1 = "The winter season is cold and wet but snow is cool".split()

input2 = "The summer season is hot and humid but sun is shining".split()


count = 0
i = 1
input3 = []
while i == 4:
    for i in range(len(input1)):
        for j in range(len(input2)):
            if i in j:
                if j in i:
                    input3.append(i and j)
                    count += 1

Answer 1

Perhaps a nested for loop would work. Try this:

input1 = "The winter season is cold and wet but snow is cool".split()
input2 = "The summer season is hot and humid but sun is shining".split()

input3 = []

for i in input1:
    for x in input2:
        if i == x:
            input3.append(i)

input3 = list(dict.fromkeys(input3)) #This removes duplicates from the list. Delete it if you want duplicates
if len(input3) == 4:
    print("Contains 4 Words")
    
print(input3)

Answer 2

set s are great for this. No need for writing loops:

input1 = "The winter season is cold and wet but snow is cool"
input2 = "The summer season is hot and humid but sun is shining"

distinct_words = set.intersection(*map(set, map(str.split, (input1, input2))))

print(len(distinct_words))

---

5

You could always just use the intersection operator as well:

len(set(input1.split()) & set(input2.split()))

---

5