Python BeautifulSoup无法选择特定标记

我的问题是解析一个网站，然后用BS加载数据树。如何查找标记的内容？我试过了

for first in soup.find_all("li", class_="li-in"):
    print first.select("em.fl.in-date").string

                   #or

    print first.select("em.fl.in-date").contents

但它不起作用。请帮忙

我正在tutti.ch上寻找汽车

这是我的全部代码：

#Crawl tutti.ch
import urllib
thisurl = "http://www.tutti.ch/stgallen/fahrzeuge/autos"
handle = urllib.urlopen(thisurl)
html_gunk =  handle.read()

from bs4 import BeautifulSoup
soup = BeautifulSoup(html_gunk, 'html.parser')

for first in soup.find_all("li", class_="li-in"):
    if first.a.string and "Audi" and "BMW" in first.a.string:
        print "Geschafft: %s" % first.a.contents
        print first.select("em.fl.in-date").string
    else:
        print first.a.contents

当它发现一辆宝马或奥迪时，它应该检查汽车是何时插入的。时间位于em标记中，如下所示：

今日 13:59

假设您的选择器是正确的。您没有提供要删除的URL，所以我不能确定

>>> url = "http://stackoverflow.com/questions/38187213/python-beautifulsoup"
>>> from bs4 import BeautifulSoup
>>> import urllib2
>>> html = urllib2.urlopen(url).read()
>>> soup = BeautifulSoup(html)
>>> soup.find_all("p")[0].text
u'My problem is when parsing a website and then loading the data tree with BS. How can I look for the content of an <em> Tag? I tried '

---

非常感谢亚当·巴恩斯。你的代码工作得很好！！奥迪永远都是真的

>>> url = "http://stackoverflow.com/questions/38187213/python-beautifulsoup"
>>> from bs4 import BeautifulSoup
>>> import urllib2
>>> html = urllib2.urlopen(url).read()
>>> soup = BeautifulSoup(html)
>>> soup.find_all("p")[0].text
u'My problem is when parsing a website and then loading the data tree with BS. How can I look for the content of an <em> Tag? I tried '

#Crawl tutti.ch
import urllib
thisurl = "http://www.tutti.ch/stgallen/fahrzeuge/autos"
handle = urllib.urlopen(thisurl)
html_gunk =  handle.read()

from bs4 import BeautifulSoup
soup = BeautifulSoup(html_gunk, 'html.parser')

for first in soup.find_all("li", class_="li-in"):
    if first.a.string and "Audi" and "BMW" in first.a.string:
        print "Geschafft: %s" % first.a.contents
        print first.select("em.fl.in-date")[0].text
    else:
        print first.a.contents