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from flask import Flask
from flask import render_template
from flask import request
from flask_babel import Babel
from flask_babel import lazy_gettext as _
from wtforms import StringField
from wtforms.validators import DataRequired
from flask_wtf import FlaskForm
class BabelForm(FlaskForm):
name = StringField(_("Name"), validators=[DataRequired()])
DEBUG = True
SECRET_KEY = "secret"
WTF_I18N_ENABLED = True
def get_locale():
"""how to get the locale is defined by you.
Match by the Accept Language header::
match = app.config.get('BABEL_SUPPORTED_LOCALES', ['en', 'zh'])
default = app.config.get('BABEL_DEFAULT_LOCALES', 'en')
return request.accept_languages.best_match(match, default)
"""
# this is a demo case, we use url to get locale
code = request.args.get("lang", "en")
return code
app = Flask(__name__)
app.config.from_object(__name__)
# config babel
babel = Babel(app, locale_selector=get_locale)
@app.route("/", methods=("GET", "POST"))
def index():
form = BabelForm()
if form.validate_on_submit():
pass
return render_template("index.html", form=form)
if __name__ == "__main__":
app.run()
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