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我想從機構的網頁中提取href's。 我必須爲進一步的抓取活動提取部門代碼。 ，我已經寫了下面的代碼：在python3中使用beautifulsoup從html爬行錨標記的困難
import requests
import re
import urllib
from bs4 import BeautifulSoup
codesurl="http://www.iitkgp.ac.in/academics/?page=acadunits"
response = requests.get(codesurl)
# print(response.content)
soup=BeautifulSoup(response.content)
# print(soup.prettify())
p = re.compile('page=acadunits*')
p1 = re.compile('<a href=.*page=acadunits*')
links=soup.find_all("a")
print(links)
for link in links:
# if p1.match(link):
print("%s" %(link))
但我沒有得到所有HREF的，例如：
<a href="?page=acadunits&&dept=ME">Mechanical Engineering</a>
<a href="?page=acadunits&&dept=MD">Medical Science & Technology</a>
<a href="?page=acadunits&&dept=MT">Metallurgical & Materials Engineering</a>
，還有更多 有人可以幫我this.This是我第一次爬行。 你也可以看看website.I需要從URL中提取部門代碼
dept=ME
dept=MT
dept=MD
我的網頁包含：
<div class="tab_container">
<div id="tab1" class="tab_content" style="display: block;">
<h3></h3>
<!--Content-->
<img src="./Indian Institute of Technology Kharagpur_files/academicunits.jpg">
<br><br>
<a href="http://www.iitkgp.ac.in/academics/?page=acadunits&&dept=AE">Aerospace Engineering</a><br>
<a href="http://www.iitkgp.ac.in/academics/?page=acadunits&&dept=AG">Agricultural & Food Engineering</a><br>
<a href="http://www.iitkgp.ac.in/academics/?page=acadunits&&dept=AR">Architecture & Regional Planning</a><br>
<a href="http://www.iitkgp.ac.in/academics/?page=acadunits&&dept=BT">Biotechnology</a><br>
<a href="http://www.iitkgp.ac.in/academics/?page=acadunits&&dept=CH">Chemical Engineering</a><br>
<a href="http://www.iitkgp.ac.in/academics/?page=acadunits&&dept=CM">Chemistry</a><br>
<a href="http://www.iitkgp.ac.in/academics/?page=acadunits&&dept=CE">Civil Engineering</a><br>
<a href="http://www.iitkgp.ac.in/academics/?page=acadunits&&dept=CS">Computer Science & Engineering</a><br>
<a href="http://www.iitkgp.ac.in/academics/?page=acadunits&&dept=CR">Cryogenic Engineering</a><br>
<a href="http://www.iitkgp.ac.in/academics/?page=acadunits&&dept=ED">Center for Educational Technology</a><br>
<a href="http://www.iitkgp.ac.in/academics/?page=acadunits&&dept=EE">Electrical Engineering</a><br>
<a href="http://www.iitkgp.ac.in/academics/?page=acadunits&&dept=EC"> Electronics & Electrical Communication Engineering</a><br>
<a href="http://www.iitkgp.ac.in/academics/?page=acadunits&&dept=GS">G S Sanyal School of Telecommunications</a><br>
<a href="http://www.iitkgp.ac.in/academics/?page=acadunits&&dept=MG">Geology & Geophysics</a><br>
<a href="http://www.iitkgp.ac.in/academics/?page=acadunits&&dept=HS">Humanities & Social Sciences</a><br>
<a href="http://www.iitkgp.ac.in/academics/?page=acadunits&&dept=IM">Industrial & Systems Engineering</a><br>
<a href="http://www.iitkgp.ac.in/academics/?page=acadunits&&dept=IT">Information Technology</a><br>
<a href="http://www.iitkgp.ac.in/academics/?page=acadunits&&dept=MS">Materials Science</a><br>
<a href="http://www.iitkgp.ac.in/academics/?page=acadunits&&dept=MM">Mathematics</a><br>
<a href="http://www.iitkgp.ac.in/academics/?page=acadunits&&dept=ME">Mechanical Engineering</a><br>
<a href="http://www.iitkgp.ac.in/academics/?page=acadunits&&dept=MD">Medical Science & Technology</a><br>
<a href="http://www.iitkgp.ac.in/academics/?page=acadunits&&dept=MT">Metallurgical & Materials Engineering</a><br>
<a href="http://www.iitkgp.ac.in/academics/?page=acadunits&&dept=MI">Mining Engineering</a><br>
<a href="http://www.iitkgp.ac.in/academics/?page=acadunits&&dept=NA">Ocean Engineering & Naval Architecture</a><br>
<a href="http://www.iitkgp.ac.in/academics/?page=acadunits&&dept=N2">Oceans, Rivers, Atmosphere and Land Sciences</a><br>
<a href="http://www.iitkgp.ac.in/academics/?page=acadunits&&dept=MP">Physics</a><br>
<a href="http://www.iitkgp.ac.in/academics/?page=acadunits&&dept=PK">P K Sinha Centre for Bio Energy</a><br>
<a href="http://www.iitkgp.ac.in/academics/?page=acadunits&&dept=RJ">Rajendra Mishra School of Engineering Entrepreneurship</a><br>
<a href="http://www.iitkgp.ac.in/academics/?page=acadunits&&dept=RG">Rajiv Gandhi School of Intellectual Property Law</a><br>
<a href="http://www.iitkgp.ac.in/academics/?page=acadunits&&dept=ID">Ranbir and Chitra Gupta School of Infrastructure Design and Management</a><br>
<a href="http://www.iitkgp.ac.in/academics/?page=acadunits&&dept=RE">Reliability Engineering Centre</a><br>
<a href="http://www.iitkgp.ac.in/academics/?page=acadunits&&dept=RT">Rubber Technology Centre</a><br>
<a href="http://www.iitkgp.ac.in/academics/?page=acadunits&&dept=RD">Rural Development Centre</a><br>
<a href="http://www.iitkgp.ac.in/academics/?page=acadunits&&dept=BS">School of Bioscience</a><br>
<a href="http://www.iitkgp.ac.in/academics/?page=acadunits&&dept=ES">School of Energy Science & Engineering</a><br>
<a href="http://www.iitkgp.ac.in/academics/?page=acadunits&&dept=EF">School of Environmental Science and Technology</a><br>
<a href="http://www.iitkgp.ac.in/academics/?page=acadunits&&dept=NT">School of Nano-Science and Technology</a><br>
<a href="http://www.iitkgp.ac.in/academics/?page=acadunits&&dept=WM">School of Water Resources</a><br>
<a href="http://www.iitkgp.ac.in/academics/?page=acadunits&&dept=SM">Vinod Gupta School of Management</a><br>
<br><br>
<!--Content-->
</div>
但是當我做：
codesurl="http://www.iitkgp.ac.in/academics/?page=acadunits"
response = requests.get(codesurl)
soup=BeautifulSoup(response.text)
湯呢不顯示這些href的 有人可以建議如何提取這些href標籤？