python爬虫问题求解

我想爬取西湖的门票种类和价格，但是爬取的内容为空，不知道哪方面出了问题，求解
代码如下：

from bs4 import BeautifulSoup
import pandas as pd
import requests

def crawer_travel_introduction(url):
headers = {'User-Agent': 'Mozilla/5.0 (Windows NT 6.1; WOW64; rv:23.0) Gecko/20100101 Firefox/23.0'}
req = requests.get(url, headers=headers)
content = req.text
bsObj = BeautifulSoup(content, 'lxml')
return bsObj

def get_jd_introduction(url):

cat_tickets_kind = []
cat_tickets_price= []


bsobj = crawer_travel_introduction(url)
bs = bsobj.find_all('dl', {'class': 'clrfix  '})
for j in range(0, len(bs)):
    # try:
        name = bs[j].find('dt')
        cat_tickets_kind.append(name.text)
        price = bs[j].find('dd',{'class': 'e_old_price'}).find('del')
        cat_tickets_price.append(price.text)
    # except:
    #     print('wrong')
return cat_tickets_kind, cat_tickets_price

url = 'http://travel.qunar.com/p-oi708952-xihu'
cat_tickets_kind, cat_tickets_price = get_jd_introduction(url)
city = pd.DataFrame({'tickets_kind': cat_tickets_kind, 'tickets_price': cat_tickets_price})
city.to_csv('travel_introduction.csv', encoding='utf-8')

我给你改了一下，你对比看看吧：

from bs4 import BeautifulSoup
import pandas as pd
import requests

def crawer_travel_introduction(url):
    headers = {'User-Agent': 'Mozilla/5.0 (Windows NT 6.1; WOW64; rv:23.0) Gecko/20100101 Firefox/23.0'}
    req = requests.get(url, headers=headers)
    content = req.text
    bsObj = BeautifulSoup(content, 'lxml')
    return bsObj

def get_jd_introduction(url):
    cat_tickets_kind = []
    cat_tickets_price= []
    bsobj = crawer_travel_introduction(url)
    bs = bsobj.find_all('dl', {'class': 'clrfix'})
    for j in range(0, len(bs)-1):
        name = bs[j].find('dt')
        pricedd = bs[j].find('dd',{'class':'e_now_price'})
        if name is not None and pricedd is not None:
            price= pricedd.find('span',{'class':'e_price_txt'})
            cat_tickets_kind.append(name.text)
            cat_tickets_price.append(price.text)
    return cat_tickets_kind, cat_tickets_price
url = 'http://travel.qunar.com/p-oi708952-xihu'
cat_tickets_kind, cat_tickets_price = get_jd_introduction(url)
print(cat_tickets_kind, cat_tickets_price)
city = pd.DataFrame({'tickets_kind': cat_tickets_kind, 'tickets_price': cat_tickets_price})
city.to_csv('travel_introduction.csv', encoding='utf-8')

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