wepy.util.kv module

Implement a key-value store on top of sqlite3 database.

wepy.util.kv.gen_uri(db_url, mode_spec)

class wepy.util.kv.KV(db_url=None, table='data', primary_key='key', value_name='value', timeout=5, mode='x', append_only=False, value_types=(<class 'bytes'>, <class 'bytearray'>))

Bases: collections.abc.MutableMapping

property mode

property append_only

close()

property db_uri

property db

property table

property primary_key

property value_name

property value_types

_execute(*args)

property insert_query

property update_query

property del_query

lockless_set(key, value)

an implementation of the __setitem__ without the lock context manager which turns on the DEFERRED isolation level. The isolation level of the KV is set to autocommit so now lock is needed anyhow.

set_in_tx(cursor, key, value)

Do a set with a cursor, this allows it to be done in a transaction.

del_in_tx(cursor, key)

lock()

_abc_impl = <_abc_data object>

clear() → None.  Remove all items from D.

get(k[, d]) → D[k] if k in D, else d.  d defaults to None.

items() → a set-like object providing a view on D’s items

keys() → a set-like object providing a view on D’s keys

pop(k[, d]) → v, remove specified key and return the corresponding value.

If key is not found, d is returned if given, otherwise KeyError is raised.

popitem() → (k, v), remove and return some (key, value) pair

as a 2-tuple; but raise KeyError if D is empty.

setdefault(k[, d]) → D.get(k,d), also set D[k]=d if k not in D

update([E, ]**F) → None.  Update D from mapping/iterable E and F.

If E present and has a .keys() method, does: for k in E: D[k] = E[k] If E present and lacks .keys() method, does: for (k, v) in E: D[k] = v In either case, this is followed by: for k, v in F.items(): D[k] = v

values() → an object providing a view on D’s values