字典fruits中储存了四种水果的价格，输出价格最贵的水果的名称和价格。fruits={"apple":10,"mango":20,"banana":5}

字典fruits中储存了四种水果的价格，输出价格最贵的水果的名称和价格。fruits={"apple":10,"mango":20,"banana":5}

max(fruits.items(), key=lambda x: x[1])