Decode mongo JSON in Python... with eval

mongo_json_decode.py

# It's not pretty, but it get's the job done.  JSON is valid Python, so you can eval it,
# provided that you have the proper names in scope, like ObjectId and ISODate

from dateutil import parser

NumberLong = int
ObjectId = str
false = False
true = True
null = None
ISODate = parser.parse

lines = ['{"_id" : ObjectId("5539bae79a29809df4008265"), "created_at" : ISODate("2015-04-24T03:39:19.058Z")}',
         '{"_id" : ObjectId("5539bae79a29809df4001953"), "created_at" : ISODate("2015-04-24T03:40:01.042Z")}']

docs = [eval(line) for line in lines]