new_contents: import httplib
  import urllib
  import json
  import hashlib
  import hmac
  import time
   
  api_key = "your_key"
  api_secret = "your_secret"
  
  nonce = int(round(time.time()*1000))
   
  params = {"nonce": nonce}
  params = urllib.urlencode(params)
   
  H = hmac.new(api_secret, digestmod=hashlib.sha512)
  H.update(params)
  sign = H.hexdigest()
   
  headers = {"Content-type": "application/x-www-form-urlencoded",
             "Key":api_key,
             "Sign":sign}
  conn = httplib.HTTPSConnection("api.exmo.com")
  conn.request("POST", "/v1/user_info", params, headers)
  response = conn.getresponse()
   
  print response.status, response.reason
  print json.load(response)
   
  conn.close()
subject: add python