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]]]:
    
    arr = np.array(a)

    original_elements = arr.size
    new_elements = new_shape[0] * new_shape[1]

    if original_elements != new_elements:
            return -1

    reshaped_arr = arr.reshape(new_shape)   
    return reshaped_arr.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()