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# Pymongo

### Install Pymongo

```
$ pip install pymongo
```

### Export data from Database

./export.py

```python
import pymongo
from pymongo import MongoClient

def connect(config):
    host = config.get('host')
    port = config.get('port')
    username = config.get('username')
    password = config.get('password')
    db_name = config.get('database')
    uri = 'mongodb://%(host)s:%(port)s' % vars()

    client = MongoClient(uri, username=username, password=password)
    db = client[db_name]
    return client, db


def get_item(db, item_oid):
    try:
        return db.item.find_one({'_id': item_oid})
    except Exception as e:
        logger.error('failed to find item by id. error=%s' % str(e))
        return None


if __name__ == "__main__":
    parser = optparse.OptionParser()
    parser.add_option('--id', dest='id', default=None, type='string')
    (options, args) = parser.parse_args()

    if options.id is None:
        print_usage_and_exit()

    _id = options.id

    try:
        item_oid = ObjectId(_id)
    except Exception as e:
        logger.error('invalid id. error=%s' % str(e))
        print_usage_and_exit()

    client, db = connect(config)
    item = get_item(db, item_oid)

```