Python在2D列表的第一列中查找重复项，并根据第二列删除其中一列

def remove_duplicates(lst):
    seen = set()
    result = []
    for sublist in lst:
        if sublist[0] not in seen:
            seen.add(sublist[0])
            result.append(sublist)
    return result

# 示例数据
data = [[1, 'a'], [2, 'b'], [1, 'c'], [3, 'd'], [2, 'e'], [4, 'f']]

# 调用函数去除重复项
result = remove_duplicates(data)

# 打印结果
for sublist in result:
    print(sublist)

[1, 'a']
[2, 'b']
[3, 'd']
[4, 'f']