python regex 正则表达式

pattern='<sentence id="(?P<sid>\d{3}:\d{1,2})"><text>(?P<txt>[^<]+)</text></sentence>'
html='<sentence id="141:0"><text>一直潜水，昨天入d300s +35 1.8g，谈谈感受，dx说，标题一定要长！</text></sentence><sentence id="141:1"><text>4、全画幅与半画幅的差别，</text></sentence>'
match=re.finditer(pattern,html)
for m in match:
print(m.group('sid'))
print(m.group('txt'))