leetcode 819

문제

https://leetcode.com/problems/most-common-word/

내 풀이

class Solution:
    def mostCommonWord(self, paragraph: str, banned: List[str]) -> str:
        a = paragraph.lower()
        b = ''
        for i in a:
            b += i if i.isalpha() or i is ' ' else ' '
            
        d = defaultdict(int)
        for word in list(b.split()):
            if word not in banned:
                d[word] += 1
        
        return max(d, key = d.get)