Generate UPI code to receive payment at merchant's end

generate_upi_qr_code.py

import qrcode

def generate_upi_qr_code(merchant_upi_id, merchant_name, payment_description, payment_amount):
    # create the QR code string
    qr_string = "upi://pay?pa={}&pn={}&tn={}&am={}".format(merchant_upi_id, merchant_name, payment_description, payment_amount)

    # generate the QR code
    qr = qrcode.QRCode(version=1, error_correction=qrcode.constants.ERROR_CORRECT_L, box_size=10, border=4)
    qr.add_data(qr_string)
    qr.make(fit=True)

    # save the QR code as an image file
    img = qr.make_image(fill_color="black", back_color="white")
    img.save("erupi_payment.png")