循环，我能做得更好吗？
循环，我能做得更好吗？
提问于 2013-09-24 21:44:36
我使用了Python2.7和BeautifulSoup3.2，我得到了下面的刮刀来获得流URL：
# Import the classes that are needed
import urllib2
from BeautifulSoup import BeautifulSoup
# URL to scrape and open it with the urllib2
url = 'http://www.wiziwig.tv/broadcast.php?matchid=219751&part=sports'
source = urllib2.urlopen(url)
# Turn the saved source into a BeautifulSoup object
soup = BeautifulSoup(source)
for tr in soup.findAll('tr', {'class': ['broadcast']}):
stationName = tr.findAll('td')[1].text
for trBelow in tr.findAllNext('tr'):
curClass = trBelow['class']
if curClass == 'broadcast':
break
kindStream = trBelow.findAll('td')[0].text
streamUrl = trBelow.find('a', {'class': 'broadcast go'})['href']
streamQuality = trBelow.findAll('td')[2].text
streamRating = trBelow.find('div', {'class': 'rating'})['rel']
print stationName, kindStream, streamQuality, streamRating, streamUrl它工作得很好，并给出了以下输出：
BWIN Flash 650 Kbps 100 http://forum.wiziwig.eu/threads/1847-BWIN-Info
BWIN Flash 675 Kbps 100 https://sports.bwin.com/en/sports?wm=3448325&zoneId=1068792
Bet365 Flash 650 Kbps 100 http://forum.wiziwig.eu/threads/6258-Bet365
Bet365 Flash 675 Kbps 100 http://www.bet365.com/?affiliate=365_014110
TRK Ukraine+ AceStream 1250 Kbps 100 acestream://94879770520f2e9db2146d0eca59204bfbd72cbe
TRK Ukraine+ AceStream 1251 Kbps 75 http://aviatortv.org/football_ua_plus/
Arenavision1 Sopcast 2000 Kbps 75 sop://broker.sopcast.com:3912/143876
Arenavision3 AceStream 2000 Kbps 75 acestream://a53a380706846bfc6667e21a1485dedb78b9674b
Arenavision3 AceStream 2001 Kbps 75 http://avod.me/play/a53a380706846bfc6667e21a1485dedb78b9674b
Dazsports Ace2 AceStream 850 Kbps 100 acestream://d293c82146aa6c2904e45ff305ae0f38dc5b329d
Dazsports Ace2 AceStream 851 Kbps 75 http://dazsports.org/ace2.html
Digi Sport1 [RO] Sopcast 1500 Kbps 100 sop://broker.sopcast.com:3912/146141
Digi Sport1 [RO] Sopcast 1500 Kbps 100 sop://broker.sopcast.com:3912/124992
Digi Sport1 [RO] Sopcast 1501 Kbps 100 sop://broker.sopcast.com:3912/139777
Digi Sport1 [RO] Sopcast 1501 Kbps 100 sop://broker.sopcast.com:3912/110152
Pole Position1 [NL] AceStream 1000 Kbps 100 acestream://86fd521d30e9319198b75121761eccf260fef0cb
Pole Position1 [NL] AceStream 1001 Kbps 75 http://polepositionweb.org/?page_id=6 popup
Solodeportes Veetle Veetle 850 Kbps 100 http://veetle.com/index.php/widget/index/E47CFF6CB6A770852515B8B30C2E30F6/0/true/default/false
Livesports4u4 Flash 225 Kbps 75 http://livesport4u.com/stream4.html
Cricfree Flash2 Flash 175 Kbps 75 http://cricfree.tv/live-golf-streaming-ch2.php
Njtvx9 Flash 175 Kbps 75 http://nutjob.eu/njtvx9.html
Igoal C+ Liga Flash 175 Kbps 75 http://ana1.me/liga+.html
Soccertoall2 [PT] Flash 175 Kbps 75 http://soccertoall.net/index.php?channel=2
Tugalive1 Flash 175 Kbps 75 http://www.tugalive.eu/p/live-1.html
Diresport1 Flash 175 Kbps 75 http://diresportt.blogspot.com.es/
Footstream11 Flash 175 Kbps 75 http://www.footstream.tv/channel11.html
Lag10 (8) Flash 150 Kbps 50 http://lag10.com/channel8
ANA STV2 Flash 400 Kbps 75 http://ana1.me/STV2.html
ANA STV2 Flash 400 Kbps 75 http://bliner.tv/sporttv2pt.html
Livesoccerhd4 Flash 225 Kbps 75 http://livesoccerhd.tv/l4.html
Stvstreams Ace HD1 AceStream 1500 Kbps 100 acestream://750acfc788e12220dbd57188505eae08f566281e
Stvstreams Ace HD1 AceStream 1500 Kbps 100 http://stvstreams.com/acestreams/stv-hd/
Btsportshd12 Flash 200 Kbps 75 http://www.btsportshd.com/stream12.php
Ana Stream1 Flash 175 Kbps 75 http://ana3.me/STREAM1.html
Onlinesoccer2all (13) Flash 175 Kbps 75 http://online--soccer.eu/channel13.html
Hdfoots6 Flash 175 Kbps 75 http://hdfoots.com/stream6.html但是，我想知道我是否应该这样做，或者是否有更好的方法不执行下一个循环for trBelow in tr.findAllNext('tr'):，然后当它到达特定的类时退出它？
Stack Overflow用户
发布于 2013-09-25 00:22:13
我认为你的实施已经很好了。简单地问一下，如果我想重用我收到的一些内容，该怎么办？我断言"Soup“没有为此使用内置的缓存，如果我想重新运行这个循环，它将遍历节点。
以下是我的看法：
with soup:
tr_elements, tr_belows, collection = findAll('tr', {'class': ['broadcast']}) \
[tr.findAllNext('tr') for tr in tr_elements], {}
collection['station_names'] = [tr.findAll('td').text[1] for tr in tr_elements]
collection['kind_streams'] = [trb.findAll('td').text[0] for trb in tr_belows]
## and so fourth.
print dict(collection)这仍然需要一些工作，因为它不能扫描‘广播’节点在其他。此外，我的方法的复杂性可以使用一些工作。
页面原文内容由Stack Overflow提供。腾讯云小微IT领域专用引擎提供翻译支持
原文链接：
https://stackoverflow.com/questions/18992594
复制相关文章
相似问题
腾讯云开发者
