app.route('/deleteaccount/<int:account_id>', methods=['POST']) @login_required def delete_account(account_id) : authed = session.get('authed') if not authed : return redirect(url_for('login')) form1 = DeleteAccountForm() account = User.query.get_or_404(account_id) if form1.submit.data and form1.validate() : if current_user.id != account.id : abort(401) flash('Usurpation') logout_user() db.session.delete(account) db.session.commit() session.pop('authed') flash('Disposed') else : abort(400) return redirect(url_for('login')) @db.event.listens_for(User, 'after_delete', named=True) def edit_account(**kwargs) : target = kwargs['target'] for username in [target.username] : if username is not None : dis = Photo.query.filter_by(user_name=username).delete() db.session.begin(subtransactions=True) db.session.commit() ，报错信息：TypeError: scoped_session.begin() got an unexpected keyword argument 'subtransactions'，修改报错

在你的代码中，`scoped_session` 不支持 `subtransactions` 参数。你可以使用 `session.begin_nested()` 代替 `scoped_session.begin(subtransactions=True)`，以实现嵌套事务。

以下是修改后的代码：

@app.route('/deleteaccount/<int:account_id>', methods=['POST'])
@login_required
def delete_account(account_id):
    authed = session.get('authed')
    if not authed:
        return redirect(url_for('login'))
    form1 = DeleteAccountForm()
    account = User.query.get_or_404(account_id)
    if form1.submit.data and form1.validate():
        if current_user.id != account.id:
            abort(401)
            flash('Usurpation')
        logout_user()
        db.session.delete(account)
        db.session.commit()
        session.pop('authed')
        flash('Disposed')
    else:
        abort(400)
    return redirect(url_for('login'))

@db.event.listens_for(User, 'after_delete', named=True)
def edit_account(**kwargs):
    target = kwargs['target']
    for username in [target.username]:
        if username is not None:
            dis = Photo.query.filter_by(user_name=username).delete()
            nested = db.session.begin_nested()
            nested.commit()