Python秀个性化

Question

我已经创建了这个刮板搜索在线流保存我通过所有弹出窗口。你知道吗

如果搜索结果为空，如何使其返回“无可用流”

import random
from bs4 import BeautifulSoup
import urllib2
import re
from urlparse import urljoin

user_input   = raw_input ("Search for Team = "); 


resp = urllib2.urlopen("http://idimsports.eu/football.html") 
soup = BeautifulSoup(resp, from_encoding=resp.info().getparam('charset'))

base_url = "http://idimsports.eu" 
for link in soup.find_all('a', href=re.compile(''+user_input)): 
    print urljoin(base_url, link['href'])

Answer 1

这个呢：

...
links = soup.find_all('a', href=re.compile(''+user_input))
if links:
    for link in links:
        print urljoin(base_url, link['href'])
else:
    print  "no streams available"

Answer 2

您可以保存对变量的find_all方法调用并检查其长度：

import random
from bs4 import BeautifulSoup
import urllib2
import re
from urlparse import urljoin

user_input   = raw_input ("Search for Team = "); 


resp = urllib2.urlopen("http://idimsports.eu/football.html") 
soup = BeautifulSoup(resp, from_encoding=resp.info().getparam('charset'))

base_url = "http://idimsports.eu"
links = soup.find_all('a', href=re.compile(''+user_input))
if len(links) == 0:
    print "no streams available"
else:
    for link in links: 
        print urljoin(base_url, link['href'])