检查Python中两个字符串之间的交集

Question

I'm trying to check intersection between two strings using Python. I defined this function:

def check(s1,s2):
    word_array = set.intersection(set(s1.split(" ")), set(s2.split(" ")))
    n_of_words = len(word_array)
    return n_of_words

It works with some sample string, but in this specific case:

d_word = "BANGKOKThailand"
nlp_word = "Despite Concerns BANGKOK"

print(check(d_word,nlp_word))

I got 0. What am I missing?

Answer 1

设置一包含单个字符串，设置两个包含三个字符串，并且字符串"BANGKOKThailand"不等于字符串"BANGKOK" 。

Answer 2

I can see two might-be mistakes:

n_of_words = len(array)

should be

n_of_words = len(word_array)

and

d_word = "BANGKOKThailand"

is missing a space in-between as

"BANGKOK Thailand"

Fixing those two changes gave me a result of 1.

Answer 3

I was looking for the maximum common part of 2 strings no matter where this part would be.

def get_intersection(s1, s2): 
    res = ''
    l_s1 = len(s1)
    for i in range(l_s1):
        for j in range(i + 1, l_s1):
            t = s1[i:j]
            if t in s2 and len(t) > len(res):
                res = t
    return res
#get_intersection(s1, s2)

Works for this example as well:

>>> s1 = "BANGKOKThailand"
>>> s2 = "Despite Concerns BANGKOK"
>>> get_intersection('aa' + s1 + 'bb', 'cc' + s2 + 'dd')
'BANGKOK'