def get_subscription(self, topic_name, subscription_name):
_validate_not_none('<STR_LIT>', topic_name)<EOL>_validate_not_none('<STR_LIT>', subscription_name)<EOL>request = HTTPRequest()<EOL>request.method = '<STR_LIT:GET>'<EOL>request.host = self._get_host()<EOL>request.path = '<STR_LIT:/>' +_str(topic_name) + '<STR_LIT>' + _str(subscription_name) + '<STR_LIT>'<EOL>request.path, request.query = self._httpclient._update_request_uri_query(request)  <EOL>request.headers = self._update_service_bus_header(request)<EOL>response = self._perform_request(request)<EOL>return _convert_response_to_subscription(response)<EOL>
Gets an existing subscription.

topic_name:
    Name of the topic.
subscription_name:
    Name of the subscription.