import http.client
from bs4 import BeautifulSoup

conn = http.client.HTTPConnection('2ch.hk')
conn.request('GET', '/', None, {'Accept': 'text/plain'})
res = conn.getresponse()
data = res.read()
conn.close()

soup = BeautifulSoup(str(data))
cap = soup.find(id='cf-captcha-bookmark')
src = cap.iframe['src'][2:]
reqsrc = '/'.join(src.split('/')[1:])

conn = http.client.HTTPConnection(src.split('/')[0])
conn.request('GET', '/' + reqsrc, None, {'Accept': 'text/plain'})
res = conn.getresponse()
data2 = res.read()
conn.close()

soup2 = BeautifulSoup(str(data2))
c = soup2.html.body.form
imgsrc = c.img['src']

imgsrc = '/'.join(src.split('/')[1:-1]) + '/' + imgsrc

conn = http.client.HTTPConnection(src.split('/')[0])
conn.request('GET', '/'+imgsrc, None, {'Accept': 'text/plain'})
res = conn.getresponse()
data3 = res.read()
conn.close()

image=open('.\\newimage.jpg', 'wb')
image.write(data3)
image.close()