python 正则表达式匹配电话号码

import re
phoneNumRegex = re.compile(r'(\d\d\d)(-*)(\d\d\d)(-*)(\d\d\d\d)')

mo = phoneNumRegex.search('My number is 415-555-4242.')
print('Phone number found: ' + mo.group())
print(mo.group(0))
print(mo.group(1))
print(mo.group(2))
print(mo.group(3))
print(mo.group(4))
print(mo.group(5))