getaddrinfo failed about python3-krakenex HOT 5 CLOSED

import http.client
import urllib.request
import urllib.parse

  
class Connection:
    """Kraken.com connection handler.
  
    Public methods:
    close
    """
  
  
    def __init__(self, uri = 'api.kraken.com', timeout = 30):
        """ Create an object for reusable connections.
  
        Arguments:
        uri     -- URI to connect to (default: 'https://api.kraken.com')
        timeout -- blocking operations' timeout in seconds (default: 30)
        """
        self.headers = {
            'User-Agent': 'krakenex/0.0.3 (+https://github.com/veox/krakenex)'
        }
  
        self.conn = http.client.HTTPSConnection(uri, timeout = timeout)
        
        print('conn : ' , self.conn )
  
  
    def close(self):
        """ Close the connection.
  
        No arguments.
        """
        self.conn.close()
  
  
    def _request(self, url, req = {}, headers = {}):
        """ Send POST request to API server.
  
        url     -- Fully-qualified URL with all necessary urlencoded
                   information (string, no default)
        req     -- additional API request parameters (default: {})
        headers -- additional HTTPS headers, such as API-Key and API-Sign
                   (default: {})
        """
        data = urllib.parse.urlencode(req)
        print(data)
        headers.update(self.headers)
        self.conn.request("POST", url, data, headers)
        response = self.conn.getresponse()
  
        return response.read()
    
print(Connection()._request( 'https://api.kraken.com/0/public/Depth' , req = {}, headers = {}))