请问这个错误是什么问题
import time
start_time = time.time()
x = 99
list1 = ['0', '1', '2', '3', '4', '5', '6', '7', '8', '9']
q = 0
for i in range(0, x+1, 1):
print(' ' * (x - i), end='')
for j in range(i):
if q > 9:
q = 0
if j == i-1:
print(q, end='')
else:
print(q, end=' ')
q = q + 1
print()
for k in range(0, x-1, 1):
print(' ' * (k+1), end='')
for j in range(x-j-1):
if q > 9:
q = 0
if j == i-1:
print(q, end='')
else:
print(q, end=' ')
q = q + 1
print()
end_time = time.time()
print(end_time - start_time)