python 基礎爬蟲
寫爬蟲之前要先安裝三個套件: requests , BeautifulSoup, lxml
pip不行的話可以用easy_install
pip install lxml
pip install requests
pip install BeautifulSoup4
驗證是否安裝成功
lxml
requests
BeautifulSoup4
import requests from bs4 import BeautifulSoup import lxml
再去寫爬蟲
r1=requests.get('https://www.youtube.com/watch?v=9SY16YbteM0')
soup=BeautifulSoup(r1.text,'lxml')
print soup #顯示全部網址
result = soup.select('網頁元素')
print result #顯示所選元素的程式碼
