题解 | 重塑矩阵

from typing import List, Tuple, Union
import numpy as np

def reshape_matrix(a: List[List[Union[int, float]]], new_shape: Tuple[int, int]) -> List[List[Union[int, float]]]:
    mat=np.array(a)
    old_total=mat.size
    new_total=new_shape[0]*new_shape[1]
    if new_total!=old_total:
        return -1
    else:
        mat2=mat.reshape(new_shape)
        return mat2.tolist()
def main():
    try:
        a = eval(input())
        new_shape = eval(input())
        result = reshape_matrix(a, new_shape)
        print(result)
    except Exception as e:
        print(f"输入格式错误: {e}")

if __name__ == "__main__":
    main()