python 开数组

 

列表推导式~

N=int(10)

#二维数组
a=[[j for i in range(N)] for j in range(20)]

a[1][1]=8
a[1][2]=2

for i in range(N):
    for j in range(N):
        print(a[i][j],end=' ')
    print('')


# 多维数组
a=[[[i for j in range(N)] for k in range(3)] for i in range(5)]

for i in range(5):
    for j in range(M):
        print(a[i][j])
    print('')