python二维矩阵的输入与输出方法

x=[]

a,b=map(int,input().split())

for i in range(a):

    y=list(map(int,input().split()))

    x.append(y)

 

# 矩阵输出

for i in range(a):

    for j in range(b):

        print(x[i][j], end=' ')

    print()