如何使用输入“n”在 python 中定义 n 阶矩阵？

Question

    num_array = list()
    num = input("Enter how many elements you want:")
    print('Enter numbers in array: ')
    for i in range(int(num)):
        n=input("num :")
        num_array.append(int(n))
    print('ARRAY: ',num_array)

这个在那里，但它不会给我 n 阶矩阵

Answer 1

我想如果你想要一个矩阵表示，你应该 go 和一个列表列表。 您只输入 n 个数字，但对于矩阵，您需要 n*n 个数字。 像这样使用第二个 for 循环来做到这一点：

# matrix is gonna be a list of lists 
num_array = list()

num = input("Enter how many elements you want:")
print('Enter numbers in array: ')

# first for iterates for rows
for i in range(int(num)):
    row = list()
    # second for iterates numbers in every row
    for j in range(int(num)):
        n = input("num :")
        row.append(int(n))
    num_array.append(row)

# output as matrix
for row in num_array:
    for number in row:
        print(number, end=" ")
    print()