Method _autobegin_t

lib/sqlalchemy/orm/session.py:1918–1936

(self, begin: bool = False)

        return {}

    def _autobegin_t(self, begin: bool = False) -> SessionTransaction:
        if self._transaction is None:
            if not begin and not self.autobegin:
                raise sa_exc.InvalidRequestError(
                    class="st">"Autobegin is disabled on this Session; please call "
                    class="st">"session.begin() to start a new transaction"
                )
            trans = SessionTransaction(
                self,
                (
                    SessionTransactionOrigin.BEGIN
                    if begin
                    else SessionTransactionOrigin.AUTOBEGIN
                ),
            )
            assert self._transaction is trans
            return trans

        return self._transaction

    def begin(self, nested: bool = False) -> SessionTransaction:
        class="st">"""Begin a transaction, or nested transaction,