leetcode 747. Largest Number At Least Twice of Others 至少是其他数字两倍的最大数 python list.remove()没有返回值

class Solution:
    def dominantIndex(self, nums):
        """
        :type nums: List[int]
        :rtype: int
        """
        max_num = max(nums)
        for num in nums:
            if 2*num > max_num and num != max_num:
                return -1
        return nums.index(max_num)