计算字符串中的元音

Question

我想计算给定字符串中的元音（MapReduceIterable<Document> output = dbCollection.mapReduce(map, reduce) .finalizeFunction("function Finalize(key, reduced) {return reduced;}") .filter(Filters.and(new BasicDBObject("Best Site CR GU Party ID", guCrPartyId), Filters.or(new BasicDbObject("LDoS FY", 2015), new BasicDbObject("LDoS FY", 2016),new BasicDbObject("LDoS FY", 2017)) .action(MapReduceAction.REPLACE); ）。

示例：

a, e, i, o, u

应提供：count vowels in `ajdgejfifhou`

如何使用python实现这一目标？

Answer 1

我会建议这样的事情

def numVowels(a):
    vowels = "aeuioAEUIO"
    result = 0
    for char in a:
        if char in vowels:
            result = result + 1
    return result

numVowels("ajdgejfifhou")