Basic Datastores

DictDatastore

Example:

>>> import pprint
>>> from datastore import DictDatastore, Key, Query
>>> ds = DictDatastore()
>>> for i in range(0, 3):
...   key = Key('/%d' % i)
...   ds.put(key.child('A'), '%d a value' % i)
...   ds.put(key.child('B'), '%d b value' % i)
...
>>> pprint.pprint(ds._items)
{'/0': {Key('/0/A'): '0 a value', Key('/0/B'): '0 b value'},
 '/1': {Key('/1/A'): '1 a value', Key('/1/B'): '1 b value'},
 '/2': {Key('/2/A'): '2 a value', Key('/2/B'): '2 b value'}}
>>> ds.get(Key('/1/A'))
'1 a value'
>>> for item in ds.query(Query(Key('/2'))):
...   print item
...
2 b value
2 a value

InterfaceMappingDatastore

Example:

>>> import pylibmc
>>> from datastore import InterfaceMappingDatastore, Key
>>> mc = pylibmc.Client(['127.0.0.1'])
>>> mc_ds = InterfaceMappingDatastore(mc, put='set', key=str)
>>> mc_ds.put(Key('Hello'), 'World')
>>> mc_ds.get(Key('Hello'))
'World'
>>> mc.get('/Hello')
'World'
>>> mc.set('/Hello', 'Goodbye!')
True
>>> mc_ds.get(Key('/Hello'))
'Goodbye!'