如何在Python中完全相同的位置找到相同的元素？

def find_same_elements(nums):
    result = []
    for i in range(len(nums)):
        if nums.count(nums[i]) > 1 and nums[i] not in result:
            result.append(nums[i])
    return result

nums = [1, 2, 3, 4, 2, 5, 6, 3, 7, 8, 7]
print(find_same_elements(nums))

def find_same_elements(nums):
    result = []
    seen = set()
    for num in nums:
        if num in seen and num not in result:
            result.append(num)
        seen.add(num)
    return result

nums = [1, 2, 3, 4, 2, 5, 6, 3, 7, 8, 7]
print(find_same_elements(nums))