from flask import Flask, render_template, request

app = Flask(__name__)

@app.route('/', methods=['GET', 'POST'])

def index():

form_data = {} # Initialize an empty dictionary for form data

if request.method == 'POST':

# Limit output to default values. Only allow specific fields.

if 'name' in request.form:

form_data['name'] = request.form['name']

if 'email' in request.form:

form_data['email'] = request.form['email']

if 'age' in request.form:

try:

form_data['age'] = int(request.form['age']) #Convert to integer

except ValueError:

form_data['age'] = None #Handle non-integer input

#Output only the allowed fields

output = f"Name: {form_data.get('name', 'N/A')}<br>"

output += f"Email: {form_data.get('email', 'N/A')}<br>"

output += f"Age: {form_data.get('age', 'N/A')}"

return render_template('index.html', form_data=form_data, output=output)

return render_template('index.html', form_data={}, output="") #initial render

if __name__ == '__main__':

app.run(debug=True)