正则_括号分组

import re

phone = re.compile(r'(\d\d\d)-(\d\d\d-\d\d\d\d)')
mo = phone.search('my phone is 415-111-2345')
print(mo.group(1))
print(mo.groups())
areaCode,mainNumber = mo.groups()
print(areaCode)

结果是：
415
('415', '111-2345')
415