Is another way to save some data with type 13 or 14 ?

1) Can't insert in database some data with type 13 (Javascript). This type was found here

import pymongo
import bson

coll = pymongo.Connection().testdb.tmpcoll3
coll.remove()
coll.insert({"field": bson.Code("function(){ return true; }", scope=None)}, safe=True)
item = coll.find_one({"field": {"$type": 13}})

# item would be None but must exists

2) There is no way to save in database some data with type 14 (Symbol).