TypeError: object of type 'Cursor' has no len()
The pymongo cursor has a method count() which will return what you're looking for:
reply = db['test'].find( {"date":{"$gt":date_query}}, {"date":1,"route_id":1,"loc":1,"_id":0})length = reply.count()
Yes, count will do the work for you.
length = reply.count() or
length = reply.count(with_limit_and_skip=False)had to suffer a lot coz length = count(reply) also did not work. Since I'm not allowed to comment yet, thought to leave this answer. Hope this will help somebody to save some time.
Starting Mongo 4.0.3/PyMongo 3.7.0, you could alternatively use count_documents instead of count on a cursor:
db.collection.count_documents({ "a": 2 })# where { "a": 2 } is whatever filtering querydb.collection.count_documents is the alternative to the now deprecated db.collection.count.