Traceback (most recent call last):
  File "main.py", line 29, in <module>
    g.set_input(".//*[@id='userName']", 'fedorovna.tonya@mail.ru')
  File "/usr/local/lib/python2.7/dist-packages/grab/ext/form.py", line 125, in set_input
    elem = self.form.inputs[name]
  File "/usr/lib/python2.7/dist-packages/lxml/html/__init__.py", line 946, in __getitem__
    "No input element with the name %r" % name)
KeyError: 'No input element with the name ".//*[@id=\'userName\']"'

# -*- coding: utf-8 -*-
from grab import Grab
import time, random
headers = {
           'Host':'www.google.ru',
           'User-Agent' : 'Mozilla/5.0 (X11; Ubuntu; Linux i686; rv:34.0) Gecko/20100101 Firefox/34.0',
           'Accept' : 'image/png,image/*;q=0.8,*/*;q=0.5',
           'Accept-Language' : 'ru-RU,ru;q=0.8,en-US;q=0.5,en;q=0.3',
           'Accept-Encoding' : 'gzip, deflate',
           'Referer':'http://fotostrana.ru/',
           'Connection':'keep-alive',      
           }
g = Grab(headers=headers)
g.setup(hammer_mode=True, hammer_timeouts=((2, 5), (10, 15), (20, 30)))
g.go('http://fotostrana.ru/signup/login/', log_file='outtest.html')
time.sleep(3)
g.set_input(".//*[@id='user_email']", '********')
g.set_input(".//*[@name='user_password']",'*****')
g.submit(".//*[@id='loginPopupSubmitButton']")
print 'Авторизация прошла успешно'

# -*- coding: utf-8 -*-
from grab import Grab
import time, random
import logging
logger = logging.getLogger('grab')
logger.addHandler(logging.StreamHandler())
logger.setLevel(logging.DEBUG)
headers = {
           '(Request-Line)':'GET / HTTP/1.1',
           'Host':'fotostrana.ru',
           'User-Agent' : 'Mozilla/5.0 (X11; Ubuntu; Linux i686; rv:34.0) Gecko/20100101 Firefox/34.0',
           'Accept' : 'text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8',
           'Accept-Language' : 'ru-RU,ru;q=0.8,en-US;q=0.5,en;q=0.3',
           'Accept-Encoding' : 'gzip, deflate',
           'Referer' : 'http://fotostrana.ru/signup/login/',
           'Cookie' :'',
           'Connection' : 'keep-alive'
           }
value = {
        'csrftkn':'a285ead63a6f684aece048fbc2f9969e',
        'user_email': '***onya@40mail.ru',
        'user_password':'i**uj9',
        'submitted':'1',
        'issetFields[]':'csrftkn',
        'issetFields[]':'user_email',
        'issetFields[]':'user_password', 
        'issetFields[]':'submitted',
        '_fs2ajax':'1'       
        }
g = Grab()
g.setup(hammer_mode=True, hammer_timeouts=((2, 5), (10, 15), (20, 30)))
g.go('http://fotostrana.ru/signup/login/', log_file='outtest.html')
time.sleep(3)
for elem in g.doc.select(".//*[@name='csrftkn']"):
    
    csrftkn = elem.attr('value')
    
value['csrftkn'] = csrftkn
g.setup(post=value)
g.request()
time.sleep(2)

from grab import Grab
g=Grab()
#print g.xpath_text('//*')
g.go("http://vk.com/")
g.set_input('email', 'xxxxxxxx@yandex.ru')
g.set_input('pass', 'xxxxxxx')
g.submit()
g.go("http://vk.com/friends?section=all")
print g.response.body

from grab import Grab
g=Grab()
#print g.xpath_text('//*')
g.go("http://fotostrana.ru/signup/login/")
print g.form
g.choose_form(1)
g.set_input('user_email', 'xxxxxxxx@yandex.ru')
g.set_input('user_password', 'xxxxxxx')
g.submit()
g.go("http://fotostrana.ru/user/xxxxxxx/")
print g.response.body

from grab import Grab
g=Grab()
#print g.xpath_text('//*')
g.go("http://fotostrana.ru/signup/login/", )
print g.form
g.choose_form(1)
g.set_input('user_email', 'fedoron****0mail.ru')
g.set_input('user_password', 'i***')
g.submit()
g.go("http://fotostrana.ru/user/79020867/", log_file='outtest2.html')