03、书店寻宝（二）

 

    题目要求：你需要爬取的是网上书店Books to ScrapeTravel这类书中，所有书的书名、评分、价格三种信息，并且打印提取到的信息。

 

    网页URL:http://books.toscrape.com/catalogue/category/books/travel_2/index.html

 

#3、书店寻宝（二）
#    题目要求：你需要爬取的是网上书店Books to ScrapeTravel这类书中，所有书的书名、评分、价格三种信息，并且打印提取到的信息。
#    网页URL:http://books.toscrape.com/catalogue/category/books/travel_2/index.html

import requests
from bs4 import BeautifulSoup
res = requests.get('http://books.toscrape.com/catalogue/category/books/travel_2/index.html')
html = res.text
soup = BeautifulSoup(html,'html.parser')
items = soup.find_all('article',class_='product_pod')
for item in items:
    print(item.find('h3').find('a')['title']+'\t'+item.find('p')['class'][1],'\t',item.find('p',class_='price_color').text)
#    print(item.find('h3').find('a')['title'])
#    print(item.find('p')['class'][1])
#    print(item.find('p',class_='price_color').text)


'''
执行结果如下：
It's Only the Himalayas Two      £45.17
Full Moon over Noahâs Ark: An Odyssey to Mount Ararat and Beyond    Four     £49.43
See America: A Celebration of Our National Parks & Treasured Sites      Three    £48.87
Vagabonding: An Uncommon Guide to the Art of Long-Term World Travel     Two      £36.94
Under the Tuscan Sun    Three    £37.33
A Summer In Europe      Two      £44.34
The Great Railway Bazaar        One      £30.54
A Year in Provence (Provence #1)        Four     £56.88
The Road to Little Dribbling: Adventures of an American in Britain (Notes From a Small Island #2)   One          £23.21
Neither Here nor There: Travels in Europe       Three    £38.95
1,000 Places to See Before You Die      Five     £26.08
'''

'''
老师的代码

import requests
from bs4 import BeautifulSoup

res_bookstore = requests.get('http://books.toscrape.com/catalogue/category/books/travel_2/index.html')
bs_bookstore = BeautifulSoup(res_bookstore.text,'html.parser')
list_books = bs_bookstore.find_all(class_='product_pod')
for tag_books in list_books:
# 找到a标签需要提取两次
    tag_name = tag_books.find('h3').find('a')
# 这个p标签的class属性有两种："star-rating"，以及具体的几星比如"Two"。我们选择所有书都有的class属性："star-rating"
    list_star = tag_books.find('p',class_="star-rating")
# 价格比较好找，根据属性提取，或者标签与属性一起都可以
    tag_price = tag_books.find('p',class_="price_color")
# 这里用到了tag['属性名']提取属性值
    print(tag_name['title'])
# 同样是用属性名提取属性值
    print('star-rating:',list_star['class'][1])
# 用list_star['class']提取出来之后是一个由两个值组成的列表，如："['star-rating', 'Two']"，我们最终要提取的是这个列表的第1个值："Two"。
# 为什么是列表呢？因为这里的class属性有两个值。其实，在这个过程中，我们是使用class属性的第一个值提取出了第二个值。
# 打印的时候，我加上了换行，为了让数据更加清晰地分隔开，当然你也可以不加。</code></pre>
    print('Price:',tag_price.text, end='\n'+'------'+'\n')
'''

 

items中每个Tag的内容如下

 

<article class="product_pod">
    <div class="image_container">
        <a href="../../../its-only-the-himalayas_981/index.html"><img alt="It's Only the Himalayas" class="thumbnail"
                src="../../../../media/cache/27/a5/27a53d0bb95bdd88288eaf66c9230d7e.jpg" /></a>
    </div>
    <p class="star-rating Two">
        <i class="icon-star"></i>
        <i class="icon-star"></i>
        <i class="icon-star"></i>
        <i class="icon-star"></i>
        <i class="icon-star"></i>
    </p>
    <h3><a href="../../../its-only-the-himalayas_981/index.html" title="It's Only the Himalayas">It's Only the
            Himalayas</a></h3>
    <div class="product_price">
        <p class="price_color">£45.17</p>
        <p class="instock availability">
            <i class="icon-ok"></i>


            In stock


        </p>
        <form>
            <button class="btn btn-primary btn-block" data-loading-text="Adding..." type="submit">Add to basket</button>
        </form>
    </div>
</article>