import random
from flask import Flask, request, session, redirect, url_for, render_template, flash
from flask.ext.sqlalchemy import SQLAlchemy
from werkzeug.routing import RequestRedirect

app = Flask(__name__)
app.config["DEBUG"] = True

SQLALCHEMY_DATABASE_URI = "mysql+mysqlconnector://{username}:{password}@{hostname}/{databasename}".format(
    username="majaokholm",
    password="oppåFarshat@68",
    hostname="majaokholm.mysql.pythonanywhere-services.com",
    databasename="majaokholm$majaokholm",
)
app.config["SQLALCHEMY_DATABASE_URI"] = SQLALCHEMY_DATABASE_URI
app.config["SQLALCHEMY_POOL_RECYCLE"] = 299

db = SQLAlchemy(app)

class Comment(db.Model):

    __tablename__ = "comments"

    id = db.Column(db.Integer, primary_key=True)
    content = db.Column(db.String(4096))

@app.route("/")
def index():
    return render_template("index_page.html")

@app.route('/post', methods=["GET", "POST"])
def post():
    if request.method == "GET":
        return render_template("post_page.html", comments=Comment.query.all())
    comment = Comment(content=request.form["contents"])
    db.session.add(comment)
    db.session.commit()
    return redirect(url_for('post'))

<form action="." method="POST">
<textarea class="form-control" name="contents" placeholder="Enter a
comment"></textarea>
<input type="submit" value="Post comment">
                </form>