Jan-01 Word Pattern

[chenye-814]

https://leetcode.com/problems/word-pattern/

[chenye-814]

view code

from collections import Counter

class Solution:
    def wordPattern(self, pattern: str, s: str) -> bool:
        words = s.split(" ")
        if (len(pattern) != len(words) 
            or len(Counter(pattern)) != len(Counter(words))):
            return False
        _dict = {}
        for i in range(len(pattern)):
            letter, word = pattern[i], words[i]
            if letter not in _dict:
                _dict[letter] = word
            elif _dict[letter] != word:
                return False
        return True