最初に、答えのある同じ質問をすでに見つけたと言いたいのですが、それらを機能させることができませんでした。レビューからデータを抽出しようとしましたが、今のところレビューの内容と有用性です。私は、BeautifulSoup と Python 全般に不慣れです。
今のところ、findAll メソッドを使用して、レビューを含む div のリストを取得します。たとえば、製品に関する意見を含むランダムなサイトです。
import urllib2
from BeautifulSoup import BeautifulSoup
turl = "http://www.amazon.com/The-Great-Gatsby-Scott-Fitzgerald/product-reviews/0743273567/ref=cm_cr_pr_hist_5?ie=UTF8&filterBy=addFiveStar&showViewpoints=0"
page= urllib2.urlopen(turl);
soup = BeautifulSoup(page);
products = soup.findAll("div", style = "margin-left:0.5em;")
print products[0]
このようにして、次のような出力が得られます。
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335 of 368 people found the following review helpful
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<span style="margin-right:5px;"><span class="swSprite s_star_5_0 " title="5.0 out of 5 stars"><span>5.0 out of 5 stars</span></span> </span>
<span style="vertical-align:middle;"><b>Decades later, still great but on different terms.</b>, <nobr>August 24, 2001</nobr></span>
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<div><div style="float:left;">By </div><div style="float:left;"><a href="http://www.amazon.com/gp/pdp/profile/A1IKD6BDEE18CI"><span style="font-weight: bold;">mirope "mirope"</span></a> - <a href="http://www.amazon.com/gp/cdp/member-reviews/A1IKD6BDEE18CI?ie=UTF8&sort_by=MostRecentReview">See all my reviews</a><br />
<a href="http://www.amazon.com/gp/help/customer/display.html?ie=UTF8&nodeId=14279681&pop-up=1#VN" target="AmazonHelp" onclick="return amz_js_PopWin(this.href,'AmazonHelp','width=340,height=340,resizable=1,scrollbars=1,toolbar=1,status=1');"><span class="cmtySprite s_BadgeVineVoice "><span>(VINE VOICE)</span></span></a>
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<span class="crVerifiedStripe"><b class="h3color tiny" style="margin-right: 0.5em;">Amazon Verified Purchase</b><span class="tiny verifyWhatsThis">(<a href="http://www.amazon.com/gp/community-help/amazon-verified-purchase" target="AmazonHelp" onclick="amz_js_PopWin('http://www.amazon.com/gp/community-help/amazon-verified-purchase', 'AmazonHelp', 'width=400,height=500,resizable=1,scrollbars=1,toolbar=0,status=1');return false; ">What's this?</a>)</span></span>
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<b><span class="h3color tiny">This review is from: </span><a href="https://rads.stackoverflow.com/amzn/click/com/0684801523" rel="nofollow noreferrer">The Great Gatsby (Paperback)</a></b>
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Having reread this book for the first time in 20 years, I can confirm that there's a reason that it's considered one of the very best American novels. However, my reaction to the story was different than when I first read it in high school. I recall that back then I was hoping that Daisy and Gatsby's love story would ultimately yield a happy ending. Now, I found them both to be such shallow creatures that they inspired no pity. While I considered the characters to be emotionally stunted, that dooesn't mean I was not impressed with Fitzergerald's skillful rendering. As in most forms of art, in literature it is more difficult to accurately and interestingly portray nothingness than to describe a richly endowed subject. At this more cynical age, I found Daisy to be a remarkable emotional void, and Gatsby's quest to pour all of his hopes and dreams into such a shallow cauldron only confirmed his own vapidity. One thing that hasn't changed in all these years is my amazement at Fitzgerald's ability to set a scene. His descriptive passages are truly poetic, and his command of word choice in unparalleled. All this made for a stimulating and delightful read.
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そして、この出力から 2 つの整数を抽出したいと思います - 335 と 368 (何人の人が役に立ったと思ったか) とレビューのテキストを含む文字列 (タグと改行なしの単語のみ) で、メインに配置されます。 div、5 つのサブ div の下。タグを操作して、この div の一部を残りの部分なしで取得するにはどうすればよいですか?
編集：
BeautifulSoap によって返されたオブジェクトを文字列に変換し、スープにロードし直しました。他の方法はありますか? あまりいいようには見えません。次に、あなたの方法を使用しますが、多くの空の行が表示されます。それらをストライピングして条件を使用して削除しようとしますが、まだそこにあります:
import urllib2
from BeautifulSoup import BeautifulSoup
turl = "http://www.amazon.com/The-Great-Gatsby-Scott-Fitzgerald/product-reviews/0743273567/ref=cm_cr_pr_hist_5?ie=UTF8&filterBy=addFiveStar&showViewpoints=0"
toppage = urllib2.urlopen(turl);
soup = BeautifulSoup(toppage);
products = soup.findAll("div", style = "margin-left:0.5em;")
for (counter,i) in enumerate(products):
soup2 = BeautifulSoup(str(products[counter]))
for (counter2,x) in enumerate(soup2.div):
if x.string:
if x.string.isspace:
print "empty string"
else:
print "string number " + str(counter) + " " + x.string.strip().lstrip()
**