题解 | 标量的矩阵乘法

from typing import List, Union

def scalar_multiply(matrix: List[List[Union[int, float]]], scalar: Union[int, float]) -> List[List[Union[int, float]]]:
    result = [[scalar * x for x in row] for row in matrix]
    return result
    pass

def main():
    matrix = eval(input())
    scalar = float(input())
    result = scalar_multiply(matrix, scalar)
    print(result)

if __name__ == "__main__":
    main()