cardinal_pythonlib.sqlalchemy.logs


Original code copyright (C) 2009-2022 Rudolf Cardinal (rudolf@pobox.com).

This file is part of cardinal_pythonlib.

Licensed under the Apache License, Version 2.0 (the “License”); you may not use this file except in compliance with the License. You may obtain a copy of the License at

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Functions to assist with SQLAlchemy logs.

cardinal_pythonlib.sqlalchemy.logs.pre_disable_sqlalchemy_extra_echo_log() → None[source]

Adds a null handler to the log named sqlalchemy.engine.base.Engine, which prevents a duplicated log stream being created later.

Why is this necessary?

If you create an SQLAlchemy Engine with echo=True, it creates an additional log to stdout, via

sqlalchemy.engine.base.Engine.__init__()
sqlalchemy.log.instance_logger()
sqlalchemy.log.InstanceLogger.__init__()
    # ... which checks that the logger has no handlers and if not calls:
sqlalchemy.log._add_default_handler()
    # ... which adds a handler to sys.stdout