Saving numpy array in mongodb

Question

I have a couple of MongoDB documents wherein one my the fields is best represented as a matrix (numpy array). I would like to save this document to MongoDB, how do I do this

Answer 1

The code pymongo.binary.Binary(...) didnt work for me, may be we need to use bson as @tcaswell suggested.

Anyway here is one solution for multi-dimensional numpy array

>>from bson.binary import Binary
>>import pickle
# convert numpy array to Binary, store record in mongodb
>>record['feature2'] = Binary(pickle.dumps(npArray, protocol=2), subtype=128 )
# get record from mongodb, convert Binary to numpy array
>> npArray = pickle.loads(record['feature2'])

Having said that, the credit goes to MongoWrapper used the code written by them.