initial

test.py

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+import pymongo
+from bson.son import SON
+import datetime
+
+DBHOST = '172.16.2.15'
+DBNAME = 'iot'
+DBCOLL = 'iot'
+FILENAME = 'measurementData.xls'
+
+
+client = pymongo.MongoClient(DBHOST)
+db = client[DBNAME]
+coll = db[DBCOLL]
+
+startDate = datetime.datetime(2015, 8, 13)
+
+cursor = coll.aggregate(
+            [
+                {"$match":{"metadata.device":"MeterbusHub", "metadata.name": {"$in": ["light", "laundry", "dishwasher"]}, "metadata.day": {"$gte": startDate}}},
+                {"$sort":SON([("metadata.name",1),("metadata.day",1), ("metadata.seconds",1)])},
+                {"$group":{"_id":{"device":"$metadata.name","day":"$metadata.day"}, "first":{"$first":"$data.energy"},"last":{"$last":"$data.energy"}}},
+                {"$sort":{"_id":1}},
+                {"$project": {"energy":{"$subtract":["$last","$first"]}}}
+            ],
+            useCursor=True
+        )    
+
+for c in cursor:
+    print(c)
+
+
+
+