title: Not able to set cookies in session
body: <p>I am web scraping an ecomm - website where the product list is varies on user location. I need to set location by setting cookie value, but unable to achieve the desired results</p>
  <pre><code>import requests
  import urllib3
  
  #    Cust_Cookies={'_bb_cid':'19'}
      
  #    cookie_jar=requests.cookies.RequestsCookieJar()
  #    cookie_jar.set('_bb_cid','19',domain='.bigbasket.com',path='/')
  
  urllib3.disable_warnings(urllib3.exceptions.InsecureRequestWarning)
  
  response1=requests.get('https://www.bigbasket.com/custompage/sysgenpd/?type=pc&amp;slug=fresh-vegetables',verify=False)
  print(response1.cookies)
  
  print(response1.cookies['_bb_cid'])
  ssn=requests.Session()
  ssn.post('https://www.bigbasket.com/')
  print('session cookies before edit:\n',ssn.cookies['_bb_cid'])
  ssn.cookies.set('_bb_cid','19',domain='.bigbasket.com',path='/')
  print('session cookies after edit:\n',ssn.cookies['_bb_cid'])
  response2=ssn.get('https://www.bigbasket.com/custompage/sysgenpd/?type=pc&amp;slug=fresh-vegetables',verify=False)
  print(response2.cookies)
  
  print(response2.cookies['_bb_cid'])
  print(response1.json()['tab_info'][0]['product_info']['p_count'])
  print(response2.json()['tab_info'][0]['product_info']['p_count'])
  </code></pre>
  <p>Above sample should ideally return products for Mumbai City in repsonse1 (because i am <strong>scraping</strong> from Mumbai City with cityid as 4)
  where as for response2, it should consider Anand as city and accordingly the products should be listed.
  To verify, i just printed the count of the products in the JSON result which should be different for both the cities
  but with above code, i am getting same results in both the response.
  was expecting the value of cookie - _bb_cid in both the case should be different</p>