TypeEngine
is a class within the sqlalchemy.types
module of the SQLAlchemy project.
BOOLEAN,
Boolean,
DATE,
DATETIME,
Date,
DateTime,
Enum,
FLOAT,
Float,
INTEGER,
Integer,
Interval,
NULLTYPE,
NullType,
String,
TEXT,
TIME,
Text,
Time,
UserDefinedType,
and to_instance
are several other callables with code examples from the same sqlalchemy.types
package.
databases (project homepage and PyPI page provides asyncio support with an SQLALchemy Core interface for common relational databases such as MySQL, PostgreSQL and SQLite. This is handy for integrating with asynchronous I/O web frameworks like Sanic. The project is open sourced under the BSD 3-Clause "New" or "Revised" License.
databases / databases / backends / sqlite.py
# sqlite.py
import logging
import typing
import uuid
import aiosqlite
from sqlalchemy.dialects.sqlite import pysqlite
from sqlalchemy.engine.interfaces import Dialect, ExecutionContext
from sqlalchemy.engine.result import ResultMetaData, RowProxy
from sqlalchemy.sql import ClauseElement
from sqlalchemy.types import TypeEngine
from databases.core import LOG_EXTRA, DatabaseURL
from databases.interfaces import ConnectionBackend, DatabaseBackend, TransactionBackend
logger = logging.getLogger("databases")
class SQLiteBackend(DatabaseBackend):
def __init__(
self, database_url: typing.Union[DatabaseURL, str], **options: typing.Any
) -> None:
self._database_url = DatabaseURL(database_url)
self._options = options
self._dialect = pysqlite.dialect(paramstyle="qmark")
self._dialect.supports_native_decimal = False
self._pool = SQLitePool(self._database_url, **self._options)
async def connect(self) -> None:
pass
async def disconnect(self) -> None:
pass
def connection(self) -> "SQLiteConnection":
## ... source file continues with no further TypeEngine examples...