python求带我脱离苦海，哎_

for i in range(9):
    for j in range(1,i+2):
        print(j,sep='',end='')
    print()

觉得有用的话采纳一下哈

print('\n'.join([''.join(map(str, list(range(1, _ + 1)))) for _ in range(1, 10)]))
print(*[''.join(map(str, list(range(1, _ + 1)))) for _ in range(1, 10)], sep='\n')

皮一下，很nice~

print('\n'.join(['123456789'[:(_ + 1)] for _ in range(9)]))
print(*['123456789'[:(_ + 1)] for _ in range(9)], sep='\n')

再皮一下下~~~