Python GUI guizero: demo text fields match

# This Python code is a demo of the GUI guizero (with PushButton trigger)
# guizero works with tkinter but simpler with extra widgets eg. Slider
# https://lawsie.github.io/guizero/slider/
# passTwice.py
# Test if text fields match.

# Import the GUI widgets that you'll be using, and create the 'app' for your program.
from guizero import App, TextBox, PushButton, Text, info
app = App( title="Password checker", bg = "#FFFF00", height = 400, width = 600 )
#-------------------------------------
# Function definitions for your events go here.
def btn_go_clicked():
    if (txt_pwA.value == ""):
        info("Password","Password field is empty")
    else:
        if (txt_pwA.value == txt_pwB.value):
            info("Password","Passwords match OK")
        else:
            info("Password","Passwords DO NOT MATCH")
#-----------------
# Your GUI widgets go here
h1 = Text(app, text="Password checker")

h2_A = Text(app, text="Please enter your chosen password ..")
txt_pwA = TextBox(app)
h2_B  = Text(app, text="Please re-enter your password ..")
txt_pwB = TextBox(app)

btn_go = PushButton(app, command=btn_go_clicked, text="Test for text match ..", padx=8,pady=7)

# change parameters of widgets
# -- adjust --
h1.text_size = 30
h1.text_color = "#56789A"

btn_go.bg="#33FF55"

#----------
app.display()  # Show the GUI on the screen