C///

\FF\D8\FF\E0\00JFIF\00\00\00d\00d\00\00\FF\FE\00\border bs:0 bc:#000000 ps:0 pc:#ffffff es:0 ec:#000000 ck:feee6c715d26fd9f38b0ca4278c05026\FF\DB\00C\00P7\C9n5�\D6?\BD�\9Ds\EBp\9F[`8m\B7)o\B5\E8\E6I\99\FE3]]A2\BA\8Cw\D6E\93\\DEv\C8\009\F2\F1NI?uc\\F5\EA\96k\xN<~buv\EA\C8\D7 \8B\84\CEcxI\BBg\AE\9E=\D6+n\EC\80\C8A\8C\AE\EB\CF\D5\DA\E9"2\A4\B9j5\EB\F3W\B63\96\B30Yu\DA\FC8\ED\DF\E7Ms\FB\F1\8E\B3\FA\EA\E8\E6(\883zs\F2_\8DFk\8Bh \00\8C\DCw\D3R\B5+6X\BA\B2\C4j\AB0\B4\FCMw\C2I\8E\9B\E3\A9~9u\FA\D3l\80\C8%p\EE\FDn2� \00$\FEj\C4e\A9\DB\~\95\A7\A5\80EK\BB\8DDsP\00@@AD'k\CF\E8\DB\D2(\80\9AK\D3\85\D6lb\F2\BA\8C*\80\00)\95 59\A3R:\F3\CE"\B6\80\88\00\00i1u4�\E9\F2�\A6\A2\FACM\93WMb*\E0*\00\00\00\00\00(\A8\80\00\00\80\00\00\00\00\00\00\00\00\00\FF\D9 C/// import operator from peewee import * from peewee import sqlite3 from peewee import Expression from playhouse.fields import PickleField try: from playhouse.sqlite_ext import CSqliteExtDatabase as SqliteExtDatabase except ImportError: from playhouse.sqlite_ext import SqliteExtDatabase Sentinel = type('Sentinel', (object,), {}) class KeyValue(object): """ Persistent dictionary. :param Field key_field: field to use for key. Defaults to CharField. :param Field value_field: field to use for value. Defaults to PickleField. :param bool ordered: data should be returned in key-sorted order. :param Database database: database where key/value data is stored. :param str table_name: table name for data. """ def __init__(self, key_field=None, value_field=None, ordered=False, database=None, table_name='keyvalue'): if key_field is None: key_field = CharField(max_length=255, primary_key=True) if not key_field.primary_key: raise ValueError('key_field must have primary_key=True.') if value_field is None: value_field = PickleField() self._key_field = key_field self._value_field = value_field self._ordered = ordered self._database = database or SqliteExtDatabase(':memory:') self._table_name = table_name support_on_conflict = (isinstance(self._database, PostgresqlDatabase) or (isinstance(self._database, SqliteDatabase) and self._database.server_version >= (3, 24))) if support_on_conflict: self.upsert = self._postgres_upsert self.update = self._postgres_update else: self.upsert = self._upsert self.update = self._update self.model = self.create_model() self.key = self.model.key self.value = self.model.value # Ensure table exists. self.model.create_table() def create_model(self): class KeyValue(Model): key = self._key_field value = self._value_field class Meta: database = self._database table_name = self._table_name return KeyValue def query(self, *select): query = self.model.select(*select).tuples() if self._ordered: query = query.order_by(self.key) return query def convert_expression(self, expr): if not isinstance(expr, Expression): return (self.key == expr), True return expr, False def __contains__(self, key): expr, _ = self.convert_expression(key) return self.model.select().where(expr).exists() def __len__(self): return len(self.model) def __getitem__(self, expr): converted, is_single = self.convert_expression(expr) query = self.query(self.value).where(converted) item_getter = operator.itemgetter(0) result = [item_getter(row) for row in query] if len(result) == 0 and is_single: raise KeyError(expr) elif is_single: return result[0] return result def _upsert(self, key, value): (self.model .insert(key=key, value=value) .on_conflict('replace') .execute()) def _postgres_upsert(self, key, value): (self.model .insert(key=key, value=value) .on_conflict(conflict_target=[self.key], preserve=[self.value]) .execute()) def __setitem__(self, expr, value): if isinstance(expr, Expression): self.model.update(value=value).where(expr).execute() else: self.upsert(expr, value) def __delitem__(self, expr): converted, _ = self.convert_expression(expr)