app.py

from flask import Flask, request
app = Flask(__name__)

response = ""

@app.route('/', methods=['POST', 'GET'])
def ussd_callback():
  global response
  session_id = request.values.get("sessionId", None)
  service_code = request.values.get("serviceCode", None)
  phone_number = request.values.get("phoneNumber", None)
  text = request.values.get("text", "default")

  if text == '':
    response  = "CON What would you want to check \n"
    response += "1. My Account \n"
    response += "2. My phone number"

  elif text == '1':
    response = "CON Choose account information you want to view \n"
    response += "1. Account number \n"
    response += "2. Account balance"

  elif text == '1*1':
    accountNumber  = "ACC1001"
    response = "END Your account number is " + accountNumber

  elif text == '1*2':
   balance  = "KES 10,000"
   response = "END Your balance is " + balance

  elif text == '2':
   response = "END This is your phone number " + phone_number

  return response

if __name__ == '__main__':
    app.run(debug=True)