检查二维数组中每行和列中的重复值

def check_duplicates(matrix):
    rows = len(matrix)
    cols = len(matrix[0])

    # 检查每一行是否存在重复值
    for i in range(rows):
        row_set = set()
        for j in range(cols):
            if matrix[i][j] in row_set:
                print("第", i+1, "行存在重复值:", matrix[i][j])
            else:
                row_set.add(matrix[i][j])

    # 检查每一列是否存在重复值
    for j in range(cols):
        col_set = set()
        for i in range(rows):
            if matrix[i][j] in col_set:
                print("第", j+1, "列存在重复值:", matrix[i][j])
            else:
                col_set.add(matrix[i][j])

# 示例二维数组
matrix = [
    [1, 2, 3],
    [4, 5, 6],
    [7, 8, 9],
    [1, 2, 3]
]

# 调用函数进行检查
check_duplicates(matrix)