data visualization with python and javascript by unknow

Author:unknow
Language: eng
Format: epub

oid = bson.ObjectId() oid.generation_time Out: datetime.datetime(2015, 11, 4, 15, 43, 23...

Find the full details here.

Now that we’ve got some items in our winners collection, MongoDB makes finding them very easy its, with its find method taking a dictionary query:

res = coll.find({'category':'Chemistry'}) list(res) Out: [{u'_id': ObjectId('55f8326f26a7112e547879d6'), u'category': u'Chemistry', u'name': u'Marie Curie', u'nationality': u'Polish', u'sex': u'female', u'year': 1911}]

There are a number of special dollar-prefixed operators which allow for sophisticated querying. Let’s find all the winners after 1930 using the $gt (greater-than) operator:

Download

Copyright Disclaimer:
This site does not store any files on its server. We only index and link to content provided by other sites. Please contact the content providers to delete copyright contents if any and email us, we'll remove relevant links or contents immediately.