def post(self, email, password):
        """regisiter account"""
        user = model.User.query.filter_by(email=email).first()
        if user:
            abort(400, "user email=%s already exists" % email)
        pwdhash = generate_password_hash(password)
        date = datetime.datetime.utcnow()
        user = model.User(email=email, pwdhash=pwdhash, date=date)
        db.session.add(user)
        db.session.flush()
        user.name = user.userid % "user%s"
        db.session.commit()
        return user
dataset/ETHPy150Open guyskk/flask-restaction/examples/todos/todos/user.py/User.post/swapped operands of `%`