例如：
import re pattern = r"a(bc)(de)(f(g)h)i" match = re.match(pattern, "abcdefghijklmnop") if match: print(match.group()) print(match.group(0)) print(match.group(1)) print(match.group(2)) print(match.groups())
结果：
>>>
abcdefghi
abcdefghi
bc
de
('bc', 'de', 'fgh', 'g')
>>>