单行版本

print('\n'.join(' '.join(str(i*n) for n in range(1,i+1)) for i in range(1,9)))

1
2 4
3 6 9
4 8 12 16
5 10 15 20 25
6 12 18 24 30 36
7 14 21 28 35 42 49
8 16 24 32 40 48 56 64

扩展版本

for i in range(1,9):
    print(' '.join(str(i*n) for n in range(1,i+1)))

1
2 4
3 6 9
4 8 12 16
5 10 15 20 25
6 12 18 24 30 36
7 14 21 28 35 42 49
8 16 24 32 40 48 56 64

初学者版本

for i in range(1,9):
    for j in range(1,i+1):
        print(i*j," ",end="")
    print()
1
2 4
3 6 9
4 8 12 16
5 10 15 20 25
6 12 18 24 30 36
7 14 21 28 35 42 49
8 16 24 32 40 48 56 64