How to import data from mongodb to pandas?

Question

I have a large amount of data in a collection in mongodb which I need to analyze. How do i import that data to pandas? I am new to pandas and numpy. EDIT: The mongodb collection contains sensor values tagged with date and time. The sensor values are of float datatype. Sample Data: ``` { "_cls" : "SensorReport", "_id" : ObjectId("515a963b78f6a035d9fa531b"), "_types" : [ "SensorReport" ], "Readings" : [ { "a" : 0.958069536790466, "_types" : [ "Reading" ], "ReadingUpdatedDate" : ISODate("2013-04-02T08:26:35.297Z"), "b" : 6.296118156595, "_cls" : "Reading" }, { "a" : 0.95574014778624, "_types" : [ "Reading" ], "ReadingUpdatedDate" : ISODate("2013-04-02T08:27:09.963Z"), "b" : 6.29651468650064, "_cls" : "Reading" }, { "a" : 0.953648289182713, "_types" : [ "Reading" ], "ReadingUpdatedDate" : ISODate("2013-04-02T08:27:37.545Z"), "b" : 7.29679823731148, "_cls" : "Reading" }, { "a" : 0.955931884300997, "_types" : [ "Reading" ], "ReadingUpdatedDate" : ISODate("2013-04-02T08:28:21.369Z"), "b" : 6…

Accepted Answer

`pymongo` might give you a hand, followings is some code I'm using:

```
import pandas as pd
from pymongo import MongoClient

def _connect_mongo(host, port, username, password, db):
    """ A util for making a connection to mongo """

if username and password:
        mongo_uri = 'mongodb://%s:%s@%s:%s/%s' % (username, password, host, port, db)
        conn = MongoClient(mongo_uri)
    else:
        conn = MongoClient(host, port)

return conn[db]

def read_mongo(db, collection, query={}, host='localhost', port=27017, username=None, password=None, no_id=True):
    """ Read from Mongo and Store into DataFrame """

# Connect to MongoDB
    db = _connect_mongo(host=host, port=port, username=username, password=password, db=db)

# Make a query to the specific DB and Collection
    cursor = db[collection].find(query)

# Expand the cursor and construct the DataFrame
    df =  pd.DataFrame(list(cursor))

# Delete the _id
    if no_id:
        del df['_id']

return df
```

How to import data from mongodb to pandas?

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