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"""Common Database connection protocols."""
from typing import Any, Protocol
class DbConnection(Protocol):
"""Type annotation for a generic database connection object."""
def cursor(self, *args, **kwargs) -> Any:
"""A cursor object"""
...
def commit(self) -> Any:
"""Commit the transaction."""
...
def rollback(self) -> Any:
"""Rollback the transaction."""
...
class DbCursor(Protocol):
"""Type annotation for a generic database cursor object."""
def execute(self, *args, **kwargs) -> Any:
"""Execute a single query"""
...
def executemany(self, *args, **kwargs) -> Any:
"""
Execute parameterized SQL statement sql against all parameter sequences
or mappings found in the sequence parameters.
"""
...
def fetchone(self, *args, **kwargs):
"""Fetch single result if present, or `None`."""
...
def fetchmany(self, *args, **kwargs):
"""Fetch many results if present or `None`."""
...
def fetchall(self, *args, **kwargs):
"""Fetch all results if present or `None`."""
...
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