SQLAlchemy-Utils ArrowType with Flask-Babel Timezone

flask_arrow.py

from flask import Flask, g
from flask_babel import Babel

"""
Use At Your Own Risk
"""

app = Flask(__name__)
# app.config.from_object(config)
babel = Babel(app)


@babel.timezoneselector
def get_timezone():
    value = g.get('timezone') if g else ''  # g, session, cookie
    return value or config.BABEL_DEFAULT_TIMEZONE


class TimezoneArrowType(ArrowType):
    def process_result_value(self, value, dialect):
        if value:
            return arrow.get(value).to(str(get_timezone()))
        return value