Python-сообщество

>>> from grab import Grab, GrabError
from urllib import quote
import re
g = Grab()
g.go('www.google.ru/search?num=100&q=' + quote('free proxy +":8080"'))
rex = re.compile(r'(?:(?:[-a-z0-9]+\.)+)[a-z0-9]+:\d{2,4}')
for proxy in rex.findall(g.drop_space(g.css_text('body'))):
g.setup(proxy=proxy, proxy_type='http', connect_timeout=5, timeout=5)
try:
    g.go('google.com')
except GrabError:
    print proxy, 'FAIL'
else:
    print proxy, 'OK'

g = Grab()
g.go('http://www.domain.com/proxy.txt')
rex = re.compile(r'(?:(?:[-a-z0-9]+\.)+)[a-z0-9]+:\d{2,4}')
proxy = rex.findall(g.response.body)
print proxy

['164.151.129.37:3128', '122.226.113.54:808', '60.216.101.232:808']

    g.setup(proxy='nn.nn.nn.nn:8080', proxy_type='http', connect_timeout=5, timeout=5)
    try:
        g.go('http://domain.com/')
    except GrabError:
        print  'FAIL'
    else:
        print 'ok'