下面程序的输出结果为______
import re
sum = 0
pattern = 'back'
if re.match(pattern, 'backup.txt'):
sum += 1
if re.match(pattern, 'text.back'):
sum += 2
if re.search(pattern, 'backup.txt'):
sum += 4
if re.search(pattern, 'text.back'):
sum += 8
print(sum)
选项:
A:
12
B:
13
C:
8
D:
3