store the send request in Client._request

pyotrs/lib.py

@@ -1209,6 +1209,9 @@ class Client(object):
         Returns:
             requests.Response:
 
+        .. todo::
+            store/return a copy of request (e.g. for debugging purposes?!)
+
         .. note::
             Supported HTTP Methods: GET, HEAD, PATCH, POST, PUT
         """
@@ -1221,6 +1224,7 @@ class Client(object):
         headers = {"Content-Type": "application/json"}
         json_payload = json.dumps(payload)
         # print("sending {0} to {1} as {2}".format(payload, url, http_method.upper()))
+
         try:
             response = requests.request(http_method.upper(),
                                         url,
@@ -1272,6 +1276,9 @@ class Client(object):
         self._result_status_code = response.status_code
         self._result_content = response.content
 
+        # store a copy of the request
+        self._request = response.request
+
         if self.operation == "SessionCreate":
             self._result_type = "SessionID"
         elif self.operation == "TicketGet":