Is there a standard for autocommit In PEP 249

[snippsat]

that I would find a reference to autocommit in the PEP.

There is a reference as i posted over,the default for Python is auto-commit off.
If database authors follow this Python standard is up to them.
They can have there own reason not to,then it should be clear in there documentation.

Note that if the database supports an auto-commit feature,this must be initially off. An interface method may be provided to turn it back on.