Fixed typo, improved formatting. Thanks to @JarbasAI!

fbchat/client.py

@@ -1391,12 +1391,11 @@ class Client(object):
 
                 # Chat timestamp
                 elif mtype == "chatproxy-presence":
-                    buddyList = []
-                    for id in m.get("buddyList", {}).keys():
-                        payload = m["buddyList"][id]
-                        timestamp = payload["lat"]
-                        buddyList.append({id:timestamp})
-                    self.onChatTimestamp(buddylist=buddyList, msg=m)
+                    buddylist = {}
+                    for _id in m.get('buddyList', {}):
+                        payload = m['buddyList'][_id]
+                        buddylist[_id] = payload.get('lat')
+                    self.onChatTimestamp(buddylist=buddylist, msg=m)
 
                 # Unknown message type
                 else:
@@ -1685,7 +1684,7 @@ class Client(object):
         """
         pass
 
-    def onChatTimestamp(self, buddylist={), msg={}):
+    def onChatTimestamp(self, buddylist={}, msg={}):
         """
         Called when the client receives chat online presence update