server.py

from flask import Flask, render_template, url_for, request, redirect
import csv

app = Flask(__name__)


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


@app.route('/<string:page_name>')
def html_page(page_name):
    return render_template(page_name)


def write_to_csv(data):
    with open('database.csv', mode='a') as database:
        name = data["name"]
        email = data["email"]
        message = data["message"]
        csv_writer = csv.writer(database, delimiter=',',
                                quotechar=' ', quoting=csv.QUOTE_MINIMAL)
        csv_writer.writerow([name, email, message])


@app.route('/submit_form', methods=['POST', 'GET'])
def submit_form():
    if request.method == 'POST':
        try:
            data = request.form.to_dict()
            write_to_csv(data)
            print(data)
            return redirect('index.html')
        except:
            return 'Unable to save to database'
    else:
        return 'Error in Sending. Please try again.'