这段代码为什么会报错：class Solution: def judge(self, alpha): words = "aeiou" if alpha in words: return True else: return False def vowelStrings(self, words: List[str], queries: List[List[int]]) -> List[int]: length = len(words) prefix = [0 for i in range(0, length + 1)] for i in range(1, length + 1): if judge(words[i-1][0]) and judge(words[i-1][-1]): prefix[i] = prefix[i-1] + 1 else: prefix[i] = prefix[i-1] ans = [] for query in queries: ans.append(prefix[query[1]+1] - prefix[query[0]]) return ans

这段代码会报错是因为在函数`vowelStrings`的循环中调用了函数`judge`，但是函数前面没有加上`self`，因此Python无法识别这个函数。需要将函数调用改为`self.judge`。

修改后的代码如下：

class Solution:
    def judge(self, alpha):
        words = "aeiou"
        if alpha in words:
            return True
        else:
            return False
    
    def vowelStrings(self, words: List[str], queries: List[List[int]]) -> List[int]:
        length = len(words)
        prefix = [0 for i in range(0, length + 1)]
        for i in range(1, length + 1):
            if self.judge(words[i-1][0]) and self.judge(words[i-1][-1]):
                prefix[i] = prefix[i-1] + 1
            else:
                prefix[i] = prefix[i-1]
        ans = []
        for query in queries:
            ans.append(prefix[query[1]+1] - prefix[query[0]])
        return ans

现在代码已经修改好了，可以正常运行。