用Python數組刮取URL

Question

我試圖把URL放入一個數組中，所以我可以再次使用它們。但是，當我將數組索引0更改爲1時，我的編譯器顯示「IndexError：列表索引超出範圍」。

爲什麼URL只存儲在索引0中？

感謝

from urllib.parse import urlencode, urlparse, parse_qs 

from lxml.html import fromstring 
from requests import get 
raw = get("https://www.google.com/search?q=StackOverflow").text 
page = fromstring(raw) 

for result in page.cssselect(".r a"): 
    url = result.get("href") 
    if url.startswith("/url?"): 
     url = parse_qs(urlparse(url).query)['q'] 
     print(url[1]) 

Answer 1

你需要做一個列表收集您找到的每個網址：

from urllib.parse import urlencode, urlparse, parse_qs 
from lxml.html import fromstring 
from requests import get 

raw = get("https://www.google.com/search?q=StackOverflow").text 
page = fromstring(raw) 

# an empty list of the urls 
urls = [] 

for result in page.cssselect(".r a"): 
    url = result.get("href") 
    if url.startswith("/url?"): 
     url = parse_qs(urlparse(url).query)['q'] 
     # add this url to the list of urls 
     urls += url 

print(urls) 

Answer 2

Python是零基礎，所以你需要做的

print(url[0])

或更好，但

print(url)