Python ile web kazıma

Python'da Orta Düzey Veri İçe Aktarma

Hugo Bowne-Anderson

Data Scientist at DataCamp

HTML

Yapılandırılmamış ve yapılandırılmış verinin karışımı
Yapılandırılmış veri:
- Önceden tanımlı bir veri modeli vardır ya da
- Tanımlı bir şekilde düzenlenmiştir
Yapılandırılmamış veri: bu özelliklerin hiçbiri yoktur

ch_1_3.008.png

BeautifulSoup

HTML’den yapılandırılmış veriyi ayrıştırıp çıkarın

ch_1_3.011.png

Etiket yığınını düzenleyip bilgiyi çıkarın

BeautifulSoup

from bs4 import BeautifulSoup
import requests
url = 'https://www.crummy.com/software/BeautifulSoup/'
r = requests.get(url)
html_doc = r.text
soup = BeautifulSoup(html_doc)

Biçimlendirilmiş Soup

print(soup.prettify())

<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN" "http://www.w3.org/TR/REC-html40/transitional.dtd">
<html>
 <head>
  <meta content="text/html; charset=utf-8" http-equiv="Content-Type"/>
  <title>
   Beautiful Soup: We called him Tortoise because he taught us.
  </title>
  <link href="mailto:[email protected]" rev="made"/>
  <link href="/nb/themes/Default/nb.css" rel="stylesheet" type="text/css"/>
  <meta content="Beautiful Soup: a library designed for screen-scraping HTML and XML." name="Description"/>
  <meta content="Markov Approximation 1.4 (module: leonardr)" name="generator"/>
  <meta content="Leonard Richardson" name="author"/>
 </head>
 <body alink="red" bgcolor="white" link="blue" text="black" vlink="660066">
  <img align="right" src="10.1.jpg" width="250"/>
  <br/>
  <p>

BeautifulSoup’u keşfetme

Şu gibi birçok yöntem vardır:

print(soup.title)

<title>Beautiful Soup: We called him Tortoise because he taught us.</title>

print(soup.get_text())

Beautiful Soup: We called him Tortoise because he taught us.
You didn't write that awful page. You're just trying to
get some data out of it. Beautiful Soup is here to 
help. Since 2004, it's been saving programmers hours or
days of work on quick-turnaround screen scraping 
projects.

BeautifulSoup’u keşfetme

find_all()

for link in soup.find_all('a'):
    print(link.get('href'))

bs4/download/
#Download
bs4/doc/
#HallOfFame
https://code.launchpad.net/beautifulsoup
https://groups.google.com/forum/?fromgroups#!forum/beautifulsoup
http://www.candlemarkandgleam.com/shop/constellation-games/
http://constellation.crummy.com/Constellation%20Games%20excerpt.html
https://groups.google.com/forum/?fromgroups#!forum/beautifulsoup
https://bugs.launchpad.net/beautifulsoup/
http://lxml.de/
http://code.google.com/p/html5lib/

Haydi pratik yapalım!

Python'da Orta Düzey Veri İçe Aktarma