Merge pull request #313 from mayflower/develop

Proposing #310 again in fixed version

1 files changed, 215 insertions, 215 deletions

diff --git a/sleekxmpp/plugins/xep_0323/sensordata.py b/sleekxmpp/plugins/xep_0323/sensordata.py
index 2e2f2470..30c28504 100644
--- a/sleekxmpp/plugins/xep_0323/sensordata.py
+++ b/sleekxmpp/plugins/xep_0323/sensordata.py
@@ -29,12 +29,12 @@ log = logging.getLogger(__name__)
 class XEP_0323(BasePlugin):
 
     """
-    XEP-0323: IoT Sensor Data 
+    XEP-0323: IoT Sensor Data
 
 
     This XEP provides the underlying architecture, basic operations and data
     structures for sensor data communication over XMPP networks. It includes
-    a hardware abstraction model, removing any technical detail implemented 
+    a hardware abstraction model, removing any technical detail implemented
     in underlying technologies.
 
     Also see <http://xmpp.org/extensions/xep-0323.html>
@@ -55,10 +55,10 @@ class XEP_0323(BasePlugin):
         Sensordata Event:Rejected -- Received a reject from sensor for a request
         Sensordata Event:Cancelled -- Received a cancel confirm from sensor
         Sensordata Event:Fields   -- Received fields from sensor for a request
-                                     This may be triggered multiple times since 
+                                     This may be triggered multiple times since
                                      the sensor can split up its response in
                                      multiple messages.
-        Sensordata Event:Failure  -- Received a failure indication from sensor 
+        Sensordata Event:Failure  -- Received a failure indication from sensor
                                      for a request. Typically a comm timeout.
 
     Attributes:
@@ -69,7 +69,7 @@ class XEP_0323(BasePlugin):
                     relevant to a request's session. This dictionary is used
                     both by the client and sensor side. On client side, seqnr
                     is used as key, while on sensor side, a session_id is used
-                    as key. This ensures that the two will not collide, so 
+                    as key. This ensures that the two will not collide, so
                     one instance can be both client and sensor.
         Sensor side
         -----------
@@ -89,12 +89,12 @@ class XEP_0323(BasePlugin):
 
         Sensor side
         -----------
-        register_node     -- Register a sensor as available from this XMPP 
+        register_node     -- Register a sensor as available from this XMPP
                              instance.
 
         Client side
         -----------
-        request_data      -- Initiates a request for data from one or more 
+        request_data      -- Initiates a request for data from one or more
                              sensors. Non-blocking, a callback function will
                              be called when data is available.
 
@@ -102,7 +102,7 @@ class XEP_0323(BasePlugin):
 
     name = 'xep_0323'
     description = 'XEP-0323 Internet of Things - Sensor Data'
-    dependencies = set(['xep_0030']) 
+    dependencies = set(['xep_0030'])
     stanza = stanza
 
 
@@ -155,11 +155,11 @@ class XEP_0323(BasePlugin):
                     self._handle_event_started))
 
         # Server side dicts
-        self.nodes = {};
-        self.sessions = {};
+        self.nodes = {}
+        self.sessions = {}
 
-        self.last_seqnr = 0;
-        self.seqnr_lock = Lock();
+        self.last_seqnr = 0
+        self.seqnr_lock = Lock()
 
         ## For testning only
         self.test_authenticated_from = ""
@@ -182,7 +182,7 @@ class XEP_0323(BasePlugin):
 
     def plugin_end(self):
         """ Stop the XEP-0323 plugin """
-        self.sessions.clear();
+        self.sessions.clear()
         self.xmpp.remove_handler('Sensordata Event:Req')
         self.xmpp.remove_handler('Sensordata Event:Accepted')
         self.xmpp.remove_handler('Sensordata Event:Rejected')
@@ -198,9 +198,9 @@ class XEP_0323(BasePlugin):
     def register_node(self, nodeId, device, commTimeout, sourceId=None, cacheType=None):
         """
         Register a sensor/device as available for serving of data through this XMPP
-        instance. 
+        instance.
 
-        The device object may by any custom implementation to support 
+        The device object may by any custom implementation to support
         specific devices, but it must implement the functions:
           has_field
           request_fields
@@ -212,25 +212,25 @@ class XEP_0323(BasePlugin):
             commTimeout -- Time in seconds to wait between each callback from device during
                            a data readout. Float.
             sourceId    -- [optional] identifying the data source controlling the device
-            cacheType   -- [optional] narrowing down the search to a specific kind of node        
+            cacheType   -- [optional] narrowing down the search to a specific kind of node
         """
-        self.nodes[nodeId] = {"device": device, 
+        self.nodes[nodeId] = {"device": device,
                                 "commTimeout": commTimeout,
-                                "sourceId": sourceId, 
-                                "cacheType": cacheType};
+                                "sourceId": sourceId,
+                                "cacheType": cacheType}
 
     def _set_authenticated(self, auth=''):
         """ Internal testing function """
-        self.test_authenticated_from = auth;
+        self.test_authenticated_from = auth
 
 
     def _handle_event_req(self, iq):
         """
         Event handler for reception of an Iq with req - this is a request.
 
-        Verifies that 
+        Verifies that
           - all the requested nodes are available
-          - at least one of the requested fields is available from at least 
+          - at least one of the requested fields is available from at least
             one of the nodes
 
         If the request passes verification, an accept response is sent, and
@@ -238,42 +238,42 @@ class XEP_0323(BasePlugin):
         If the verification fails, a reject message is sent.
         """
 
-        seqnr = iq['req']['seqnr'];
-        error_msg = '';
-        req_ok = True;
+        seqnr = iq['req']['seqnr']
+        error_msg = ''
+        req_ok = True
 
         # Authentication
         if len(self.test_authenticated_from) > 0 and not iq['from'] == self.test_authenticated_from:
             # Invalid authentication
-            req_ok = False;
-            error_msg = "Access denied";
+            req_ok = False
+            error_msg = "Access denied"
 
         # Nodes
-        process_nodes = [];
+        process_nodes = []
         if len(iq['req']['nodes']) > 0:
             for n in iq['req']['nodes']:
                 if not n['nodeId'] in self.nodes:
-                    req_ok = False;
-                    error_msg = "Invalid nodeId " + n['nodeId'];
-            process_nodes = [n['nodeId'] for n in iq['req']['nodes']];
+                    req_ok = False
+                    error_msg = "Invalid nodeId " + n['nodeId']
+            process_nodes = [n['nodeId'] for n in iq['req']['nodes']]
         else:
-            process_nodes = self.nodes.keys();
+            process_nodes = self.nodes.keys()
 
         # Fields - if we just find one we are happy, otherwise we reject
-        process_fields = [];
+        process_fields = []
         if len(iq['req']['fields']) > 0:
             found = False
             for f in iq['req']['fields']:
                 for node in self.nodes:
                     if self.nodes[node]["device"].has_field(f['name']):
-                        found = True;
-                        break;
+                        found = True
+                        break
             if not found:
-                req_ok = False;
-                error_msg = "Invalid field " + f['name'];
-            process_fields = [f['name'] for n in iq['req']['fields']];
+                req_ok = False
+                error_msg = "Invalid field " + f['name']
+            process_fields = [f['name'] for n in iq['req']['fields']]
 
-        req_flags = iq['req']._get_flags();
+        req_flags = iq['req']._get_flags()
 
         request_delay_sec = None
         if 'when' in req_flags:
@@ -283,7 +283,7 @@ class XEP_0323(BasePlugin):
             try:
                 dt = datetime.datetime.strptime(req_flags['when'], "%Y-%m-%dT%H:%M:%S")
             except ValueError:
-                req_ok = False;
+                req_ok = False
                 error_msg = "Invalid datetime in 'when' flag, please use ISO format (i.e. 2013-04-05T15:00:03)."
 
             if not dt is None:
@@ -292,30 +292,30 @@ class XEP_0323(BasePlugin):
                 dtdiff = dt - dtnow
                 request_delay_sec = dtdiff.seconds + dtdiff.days * 24 * 3600
                 if request_delay_sec <= 0:
-                    req_ok = False;
-                    error_msg = "Invalid datetime in 'when' flag, cannot set a time in the past. Current time: " + dtnow.isoformat();
+                    req_ok = False
+                    error_msg = "Invalid datetime in 'when' flag, cannot set a time in the past. Current time: " + dtnow.isoformat()
 
         if req_ok:
-            session = self._new_session();
-            self.sessions[session] = {"from": iq['from'], "to": iq['to'], "seqnr": seqnr};
-            self.sessions[session]["commTimers"] = {};
-            self.sessions[session]["nodeDone"] = {};
+            session = self._new_session()
+            self.sessions[session] = {"from": iq['from'], "to": iq['to'], "seqnr": seqnr}
+            self.sessions[session]["commTimers"] = {}
+            self.sessions[session]["nodeDone"] = {}
 
             #print("added session: " + str(self.sessions))
 
-            iq.reply();
-            iq['accepted']['seqnr'] = seqnr;
+            iq.reply()
+            iq['accepted']['seqnr'] = seqnr
             if not request_delay_sec is None:
                 iq['accepted']['queued'] = "true"
-            iq.send(block=False);
+            iq.send(block=False)
 
-            self.sessions[session]["node_list"] = process_nodes;
+            self.sessions[session]["node_list"] = process_nodes
 
             if not request_delay_sec is None:
                 # Delay request to requested time
                 timer = Timer(request_delay_sec, self._event_delayed_req, args=(session, process_fields, req_flags))
-                self.sessions[session]["commTimers"]["delaytimer"] = timer;
-                timer.start();
+                self.sessions[session]["commTimers"]["delaytimer"] = timer
+                timer.start()
                 return
 
             if self.threaded:
@@ -324,19 +324,19 @@ class XEP_0323(BasePlugin):
                 tr_req.start()
                 #print("started thread")
             else:
-                self._threaded_node_request(session, process_fields, req_flags);
+                self._threaded_node_request(session, process_fields, req_flags)
 
         else:
-            iq.reply();
-            iq['type'] = 'error';
-            iq['rejected']['seqnr'] = seqnr;
-            iq['rejected']['error'] = error_msg;
-            iq.send(block=False);            
+            iq.reply()
+            iq['type'] = 'error'
+            iq['rejected']['seqnr'] = seqnr
+            iq['rejected']['error'] = error_msg
+            iq.send(block=False)
 
     def _threaded_node_request(self, session, process_fields, flags):
-        """ 
+        """
         Helper function to handle the device readouts in a separate thread.
-        
+
         Arguments:
             session         -- The request session id
             process_fields  -- The fields to request from the devices
@@ -344,41 +344,41 @@ class XEP_0323(BasePlugin):
                                Formatted as a dictionary like { "flag name": "flag value" ... }
         """
         for node in self.sessions[session]["node_list"]:
-            self.sessions[session]["nodeDone"][node] = False;        
+            self.sessions[session]["nodeDone"][node] = False
 
         for node in self.sessions[session]["node_list"]:
-            timer = TimerReset(self.nodes[node]['commTimeout'], self._event_comm_timeout, args=(session, node));
-            self.sessions[session]["commTimers"][node] = timer;
+            timer = TimerReset(self.nodes[node]['commTimeout'], self._event_comm_timeout, args=(session, node))
+            self.sessions[session]["commTimers"][node] = timer
             #print("Starting timer " + str(timer) + ", timeout: " + str(self.nodes[node]['commTimeout']))
-            timer.start();
-            self.nodes[node]['device'].request_fields(process_fields, flags=flags, session=session, callback=self._device_field_request_callback);
+            timer.start()
+            self.nodes[node]['device'].request_fields(process_fields, flags=flags, session=session, callback=self._device_field_request_callback)
 
     def _event_comm_timeout(self, session, nodeId):
-        """ 
+        """
         Triggered if any of the readout operations timeout.
         Sends a failure message back to the client, stops communicating
         with the failing device.
-        
+
         Arguments:
             session         -- The request session id
             nodeId          -- The id of the device which timed out
         """
-        msg = self.xmpp.Message();
-        msg['from'] = self.sessions[session]['to'];
-        msg['to'] = self.sessions[session]['from'];
-        msg['failure']['seqnr'] = self.sessions[session]['seqnr'];            
-        msg['failure']['error']['text'] = "Timeout";
-        msg['failure']['error']['nodeId'] = nodeId;
-        msg['failure']['error']['timestamp'] = datetime.datetime.now().replace(microsecond=0).isoformat();
+        msg = self.xmpp.Message()
+        msg['from'] = self.sessions[session]['to']
+        msg['to'] = self.sessions[session]['from']
+        msg['failure']['seqnr'] = self.sessions[session]['seqnr']
+        msg['failure']['error']['text'] = "Timeout"
+        msg['failure']['error']['nodeId'] = nodeId
+        msg['failure']['error']['timestamp'] = datetime.datetime.now().replace(microsecond=0).isoformat()
 
         # Drop communication with this device and check if we are done
-        self.sessions[session]["nodeDone"][nodeId] = True;
+        self.sessions[session]["nodeDone"][nodeId] = True
         if (self._all_nodes_done(session)):
-            msg['failure']['done'] = 'true';
-        msg.send();
+            msg['failure']['done'] = 'true'
+        msg.send()
         # The session is complete, delete it
         #print("del session " + session + " due to timeout")
-        del self.sessions[session];
+        del self.sessions[session]
 
     def _event_delayed_req(self, session, process_fields, req_flags):
         """
@@ -390,47 +390,47 @@ class XEP_0323(BasePlugin):
             flags           -- [optional] flags to pass to the devices, e.g. momentary
                                Formatted as a dictionary like { "flag name": "flag value" ... }
         """
-        msg = self.xmpp.Message();
-        msg['from'] = self.sessions[session]['to'];
-        msg['to'] = self.sessions[session]['from'];
-        msg['started']['seqnr'] = self.sessions[session]['seqnr'];
-        msg.send();
+        msg = self.xmpp.Message()
+        msg['from'] = self.sessions[session]['to']
+        msg['to'] = self.sessions[session]['from']
+        msg['started']['seqnr'] = self.sessions[session]['seqnr']
+        msg.send()
 
         if self.threaded:
             tr_req = Thread(target=self._threaded_node_request, args=(session, process_fields, req_flags))
             tr_req.start()
         else:
-            self._threaded_node_request(session, process_fields, req_flags);
+            self._threaded_node_request(session, process_fields, req_flags)
 
     def _all_nodes_done(self, session):
-        """ 
+        """
         Checks wheter all devices are done replying to the readout.
-        
+
         Arguments:
             session         -- The request session id
         """
         for n in self.sessions[session]["nodeDone"]:
             if not self.sessions[session]["nodeDone"][n]:
-                return False;
-        return True;
+                return False
+        return True
 
     def _device_field_request_callback(self, session, nodeId, result, timestamp_block, error_msg=None):
-        """ 
+        """
         Callback function called by the devices when they have any additional data.
-        Composes a message with the data and sends it back to the client, and resets 
+        Composes a message with the data and sends it back to the client, and resets
         the timeout timer for the device.
-        
+
         Arguments:
             session         -- The request session id
             nodeId          -- The device id which initiated the callback
             result          -- The current result status of the readout. Valid values are:
                                "error"  - Readout failed.
                                "fields" - Contains readout data.
-                               "done"   - Indicates that the readout is complete. May contain 
+                               "done"   - Indicates that the readout is complete. May contain
                                           readout data.
-            timestamp_block -- [optional] Only applies when result != "error" 
+            timestamp_block -- [optional] Only applies when result != "error"
                                The readout data. Structured as a dictionary:
-              { 
+              {
                 timestamp:     timestamp for this datablock,
                 fields:        list of field dictionary (one per readout field).
                   readout field dictionary format:
@@ -442,7 +442,7 @@ class XEP_0323(BasePlugin):
                     dataType:  The datatype of the field. Only applies to type enum.
                     flags:     [optional] data classifier flags for the field, e.g. momentary
                                Formatted as a dictionary like { "flag name": "flag value" ... }
-                  }  
+                  }
               }
             error_msg        -- [optional] Only applies when result == "error".
                                 Error details when a request failed.
@@ -452,99 +452,99 @@ class XEP_0323(BasePlugin):
             return
 
         if result == "error":
-            self.sessions[session]["commTimers"][nodeId].cancel();
+            self.sessions[session]["commTimers"][nodeId].cancel()
 
-            msg = self.xmpp.Message();
-            msg['from'] = self.sessions[session]['to'];
-            msg['to'] = self.sessions[session]['from'];
-            msg['failure']['seqnr'] = self.sessions[session]['seqnr'];
-            msg['failure']['error']['text'] = error_msg;
-            msg['failure']['error']['nodeId'] = nodeId;
-            msg['failure']['error']['timestamp'] = datetime.datetime.now().replace(microsecond=0).isoformat();
+            msg = self.xmpp.Message()
+            msg['from'] = self.sessions[session]['to']
+            msg['to'] = self.sessions[session]['from']
+            msg['failure']['seqnr'] = self.sessions[session]['seqnr']
+            msg['failure']['error']['text'] = error_msg
+            msg['failure']['error']['nodeId'] = nodeId
+            msg['failure']['error']['timestamp'] = datetime.datetime.now().replace(microsecond=0).isoformat()
 
             # Drop communication with this device and check if we are done
-            self.sessions[session]["nodeDone"][nodeId] = True;   
+            self.sessions[session]["nodeDone"][nodeId] = True
             if (self._all_nodes_done(session)):
-                msg['failure']['done'] = 'true';
+                msg['failure']['done'] = 'true'
                 # The session is complete, delete it
                 # print("del session " + session + " due to error")
-                del self.sessions[session];
-            msg.send();
+                del self.sessions[session]
+            msg.send()
         else:
-            msg = self.xmpp.Message();
-            msg['from'] = self.sessions[session]['to'];
-            msg['to'] = self.sessions[session]['from'];
-            msg['fields']['seqnr'] = self.sessions[session]['seqnr'];
+            msg = self.xmpp.Message()
+            msg['from'] = self.sessions[session]['to']
+            msg['to'] = self.sessions[session]['from']
+            msg['fields']['seqnr'] = self.sessions[session]['seqnr']
 
             if timestamp_block is not None and len(timestamp_block) > 0:
-                node = msg['fields'].add_node(nodeId);
-                ts = node.add_timestamp(timestamp_block["timestamp"]);
+                node = msg['fields'].add_node(nodeId)
+                ts = node.add_timestamp(timestamp_block["timestamp"])
 
                 for f in timestamp_block["fields"]:
-                    data = ts.add_data( typename=f['type'], 
-                                        name=f['name'], 
-                                        value=f['value'], 
-                                        unit=f['unit'], 
-                                        dataType=f['dataType'], 
-                                        flags=f['flags']);
+                    data = ts.add_data( typename=f['type'],
+                                        name=f['name'],
+                                        value=f['value'],
+                                        unit=f['unit'],
+                                        dataType=f['dataType'],
+                                        flags=f['flags'])
 
             if result == "done":
-                self.sessions[session]["commTimers"][nodeId].cancel();
-                self.sessions[session]["nodeDone"][nodeId] = True;
-                msg['fields']['done'] = 'true';
+                self.sessions[session]["commTimers"][nodeId].cancel()
+                self.sessions[session]["nodeDone"][nodeId] = True
+                msg['fields']['done'] = 'true'
                 if (self._all_nodes_done(session)):
                     # The session is complete, delete it
                     # print("del session " + session + " due to complete")
-                    del self.sessions[session];
+                    del self.sessions[session]
             else:
                 # Restart comm timer
-                self.sessions[session]["commTimers"][nodeId].reset();
+                self.sessions[session]["commTimers"][nodeId].reset()
 
-            msg.send();
+            msg.send()
 
     def _handle_event_cancel(self, iq):
-        """ Received Iq with cancel - this is a cancel request. 
+        """ Received Iq with cancel - this is a cancel request.
         Delete the session and confirm. """
 
-        seqnr = iq['cancel']['seqnr'];
+        seqnr = iq['cancel']['seqnr']
         # Find the session
         for s in self.sessions:
             if self.sessions[s]['from'] == iq['from'] and self.sessions[s]['to'] == iq['to'] and self.sessions[s]['seqnr'] == seqnr:
                 # found it. Cancel all timers
                 for n in self.sessions[s]["commTimers"]:
-                    self.sessions[s]["commTimers"][n].cancel();
+                    self.sessions[s]["commTimers"][n].cancel()
 
                 # Confirm
-                iq.reply();
-                iq['type'] = 'result';
-                iq['cancelled']['seqnr'] = seqnr;
-                iq.send(block=False);            
-                
+                iq.reply()
+                iq['type'] = 'result'
+                iq['cancelled']['seqnr'] = seqnr
+                iq.send(block=False)
+
                 # Delete session
                 del self.sessions[s]
                 return
 
         # Could not find session, send reject
-        iq.reply();
-        iq['type'] = 'error';
-        iq['rejected']['seqnr'] = seqnr;
-        iq['rejected']['error'] = "Cancel request received, no matching request is active.";
-        iq.send(block=False);       
+        iq.reply()
+        iq['type'] = 'error'
+        iq['rejected']['seqnr'] = seqnr
+        iq['rejected']['error'] = "Cancel request received, no matching request is active."
+        iq.send(block=False)
 
-    # =================================================================
+        # =================================================================
     # Client side (data retriever) API
 
     def request_data(self, from_jid, to_jid, callback, nodeIds=None, fields=None, flags=None):
-        """ 
+        """
         Called on the client side to initiade a data readout.
         Composes a message with the request and sends it to the device(s).
         Does not block, the callback will be called when data is available.
-        
+
         Arguments:
             from_jid        -- The jid of the requester
             to_jid          -- The jid of the device(s)
-            callback        -- The callback function to call when data is availble. 
-                            
+            callback        -- The callback function to call when data is availble.
+
                             The callback function must support the following arguments:
 
                 from_jid    -- The jid of the responding device(s)
@@ -565,7 +565,7 @@ class XEP_0323(BasePlugin):
                                The timestamp of data in this callback. One callback will only
                                contain data from one timestamp.
                 fields      -- [optional] Mandatory when result == "fields".
-                               List of field dictionaries representing the readout data. 
+                               List of field dictionaries representing the readout data.
                                Dictionary format:
                   {
                     typename:  The field type (numeric, boolean, dateTime, timeSpan, string, enum)
@@ -575,11 +575,11 @@ class XEP_0323(BasePlugin):
                     dataType:  The datatype of the field. Only applies to type enum.
                     flags:     [optional] data classifier flags for the field, e.g. momentary.
                                Formatted as a dictionary like { "flag name": "flag value" ... }
-                  }  
+                  }
 
                 error_msg   -- [optional] Mandatory when result == "rejected" or "failure".
-                               Details about why the request is rejected or failed. 
-                               "rejected" means that the request is stopped, but note that the 
+                               Details about why the request is rejected or failed.
+                               "rejected" means that the request is stopped, but note that the
                                request will continue even after a "failure". "failure" only means
                                that communication was stopped to that specific device, other
                                device(s) (if any) will continue their readout.
@@ -593,131 +593,131 @@ class XEP_0323(BasePlugin):
             session      -- Session identifier. Client can use this as a reference to cancel
                             the request.
         """
-        iq = self.xmpp.Iq();
-        iq['from'] = from_jid;
-        iq['to'] = to_jid;
-        iq['type'] = "get";
-        seqnr = self._get_new_seqnr();
-        iq['id'] = seqnr;
-        iq['req']['seqnr'] = seqnr;
+        iq = self.xmpp.Iq()
+        iq['from'] = from_jid
+        iq['to'] = to_jid
+        iq['type'] = "get"
+        seqnr = self._get_new_seqnr()
+        iq['id'] = seqnr
+        iq['req']['seqnr'] = seqnr
         if nodeIds is not None:
             for nodeId in nodeIds:
-                iq['req'].add_node(nodeId);
+                iq['req'].add_node(nodeId)
         if fields is not None:
             for field in fields:
-                iq['req'].add_field(field);
+                iq['req'].add_field(field)
 
-        iq['req']._set_flags(flags);
+        iq['req']._set_flags(flags)
 
-        self.sessions[seqnr] = {"from": iq['from'], "to": iq['to'], "seqnr": seqnr, "callback": callback};
-        iq.send(block=False); 
+        self.sessions[seqnr] = {"from": iq['from'], "to": iq['to'], "seqnr": seqnr, "callback": callback}
+        iq.send(block=False)
 
-        return seqnr;
+        return seqnr
 
     def cancel_request(self, session):
-        """ 
+        """
         Called on the client side to cancel a request for data readout.
         Composes a message with the cancellation and sends it to the device(s).
-        Does not block, the callback will be called when cancellation is 
+        Does not block, the callback will be called when cancellation is
         confirmed.
-        
+
         Arguments:
             session        -- The session id of the request to cancel
         """
         seqnr = session
-        iq = self.xmpp.Iq();
+        iq = self.xmpp.Iq()
         iq['from'] = self.sessions[seqnr]['from']
-        iq['to'] = self.sessions[seqnr]['to'];
-        iq['type'] = "get";
-        iq['id'] = seqnr;
-        iq['cancel']['seqnr'] = seqnr;
-        iq.send(block=False);
+        iq['to'] = self.sessions[seqnr]['to']
+        iq['type'] = "get"
+        iq['id'] = seqnr
+        iq['cancel']['seqnr'] = seqnr
+        iq.send(block=False)
 
     def _get_new_seqnr(self):
         """ Returns a unique sequence number (unique across threads) """
-        self.seqnr_lock.acquire();
-        self.last_seqnr = self.last_seqnr + 1;
-        self.seqnr_lock.release();
-        return str(self.last_seqnr);
+        self.seqnr_lock.acquire()
+        self.last_seqnr += 1
+        self.seqnr_lock.release()
+        return str(self.last_seqnr)
 
     def _handle_event_accepted(self, iq):
         """ Received Iq with accepted - request was accepted """
-        seqnr = iq['accepted']['seqnr'];
+        seqnr = iq['accepted']['seqnr']
         result = "accepted"
         if iq['accepted']['queued'] == 'true':
             result = "queued"
 
-        callback = self.sessions[seqnr]["callback"];
-        callback(from_jid=iq['from'], result=result);
+        callback = self.sessions[seqnr]["callback"]
+        callback(from_jid=iq['from'], result=result)
 
     def _handle_event_rejected(self, iq):
-        """ Received Iq with rejected - this is a reject. 
+        """ Received Iq with rejected - this is a reject.
         Delete the session. """
-        seqnr = iq['rejected']['seqnr'];
-        callback = self.sessions[seqnr]["callback"];
-        callback(from_jid=iq['from'], result="rejected", error_msg=iq['rejected']['error']);
+        seqnr = iq['rejected']['seqnr']
+        callback = self.sessions[seqnr]["callback"]
+        callback(from_jid=iq['from'], result="rejected", error_msg=iq['rejected']['error'])
         # Session terminated
-        del self.sessions[seqnr];
+        del self.sessions[seqnr]
 
     def _handle_event_cancelled(self, iq):
-        """ 
-        Received Iq with cancelled - this is a cancel confirm. 
-        Delete the session. 
+        """
+        Received Iq with cancelled - this is a cancel confirm.
+        Delete the session.
         """
         #print("Got cancelled")
-        seqnr = iq['cancelled']['seqnr'];
-        callback = self.sessions[seqnr]["callback"];
-        callback(from_jid=iq['from'], result="cancelled");
+        seqnr = iq['cancelled']['seqnr']
+        callback = self.sessions[seqnr]["callback"]
+        callback(from_jid=iq['from'], result="cancelled")
         # Session cancelled
-        del self.sessions[seqnr];
+        del self.sessions[seqnr]
 
     def _handle_event_fields(self, msg):
-        """ 
+        """
         Received Msg with fields - this is a data reponse to a request.
         If this is the last data block, issue a "done" callback.
         """
-        seqnr = msg['fields']['seqnr'];
-        callback = self.sessions[seqnr]["callback"];
+        seqnr = msg['fields']['seqnr']
+        callback = self.sessions[seqnr]["callback"]
         for node in msg['fields']['nodes']:
             for ts in node['timestamps']:
-                fields = [];
+                fields = []
                 for d in ts['datas']:
-                    field_block = {};
-                    field_block["name"] = d['name'];
-                    field_block["typename"] = d._get_typename();
-                    field_block["value"] = d['value'];
+                    field_block = {}
+                    field_block["name"] = d['name']
+                    field_block["typename"] = d._get_typename()
+                    field_block["value"] = d['value']
                     if not d['unit'] == "": field_block["unit"] = d['unit'];
                     if not d['dataType'] == "": field_block["dataType"] = d['dataType'];
-                    flags = d._get_flags();
+                    flags = d._get_flags()
                     if not len(flags) == 0:
-                        field_block["flags"] = flags;
-                    fields.append(field_block);
+                        field_block["flags"] = flags
+                    fields.append(field_block)
+
+                callback(from_jid=msg['from'], result="fields", nodeId=node['nodeId'], timestamp=ts['value'], fields=fields)
 
-                callback(from_jid=msg['from'], result="fields", nodeId=node['nodeId'], timestamp=ts['value'], fields=fields);
-                
         if msg['fields']['done'] == "true":
-            callback(from_jid=msg['from'], result="done");
+            callback(from_jid=msg['from'], result="done")
             # Session done
-            del self.sessions[seqnr];
+            del self.sessions[seqnr]
 
     def _handle_event_failure(self, msg):
-        """ 
+        """
         Received Msg with failure - our request failed
-        Delete the session. 
+        Delete the session.
         """
-        seqnr = msg['failure']['seqnr'];
-        callback = self.sessions[seqnr]["callback"];
-        callback(from_jid=msg['from'], result="failure", nodeId=msg['failure']['error']['nodeId'], timestamp=msg['failure']['error']['timestamp'], error_msg=msg['failure']['error']['text']);
+        seqnr = msg['failure']['seqnr']
+        callback = self.sessions[seqnr]["callback"]
+        callback(from_jid=msg['from'], result="failure", nodeId=msg['failure']['error']['nodeId'], timestamp=msg['failure']['error']['timestamp'], error_msg=msg['failure']['error']['text'])
 
         # Session failed
-        del self.sessions[seqnr];
+        del self.sessions[seqnr]
 
     def _handle_event_started(self, msg):
-        """ 
-        Received Msg with started - our request was queued and is now started. 
         """
-        seqnr = msg['started']['seqnr'];
-        callback = self.sessions[seqnr]["callback"];
-        callback(from_jid=msg['from'], result="started");
-    
+        Received Msg with started - our request was queued and is now started.
+        """
+        seqnr = msg['started']['seqnr']
+        callback = self.sessions[seqnr]["callback"]
+        callback(from_jid=msg['from'], result="started")
+