An Overview of PySimpleGUI: A User-Friendly Python GUI Library

PySimpleGUI is a simple GUI library for Python that allows you to create user interfaces for your applications quickly and easily. It is designed to be easy to use and beginner-friendly, making it a great choice for those who are new to GUI programming.

In this tutorial, we will introduce you to the basics of PySimpleGUI and show you how to get started creating your own graphical user interfaces.

Installation
First, you will need to install PySimpleGUI. You can do this by running the following command in your terminal or command prompt:

pip install PySimpleGUI

Once PySimpleGUI is installed, you can start creating GUI applications in Python.

Creating a Simple Window
To create a simple window using PySimpleGUI, you first need to import the library and create a layout for your window. The layout is a list of lists that describes how you want your window to look.

Here is an example of a simple window with a text input field and a submit button:

import PySimpleGUI as sg

layout = [
    [sg.Text('Enter your name:'), sg.InputText()],
    [sg.Button('Submit')]
]

window = sg.Window('Simple Window', layout)

while True:
    event, values = window.read()

    if event == sg.WIN_CLOSED:
        break

    if event == 'Submit':
        name = values[0]
        sg.popup(f'Hello, {name}!')

window.close()

In this example, we have defined a layout with a text input field and a submit button. We then create a window with the layout and a title, ‘Simple Window’. We enter a while loop that will keep the window open until it is closed.

Handling Events
In PySimpleGUI, events are actions that are triggered by the user interacting with the window. You can handle events by checking the event variable returned by the window.read() method.

In the example above, we check for two events: sg.WIN_CLOSED, which is triggered when the window is closed, and ‘Submit’, which is triggered when the submit button is clicked. When the ‘Submit’ event is triggered, we retrieve the value of the input text field and display a popup message with the entered name.

Customizing the Window
PySimpleGUI provides a wide range of widgets that you can use to customize your window. Some common widgets include Text, InputText, Button, CheckBox, Slider, and ListBox.

You can also customize the appearance of your window by setting options such as the size, title, icon, theme, and layout.

Here is an example of a window with custom options:

layout = [
    [sg.Text('Enter your name:'), sg.InputText()],
    [sg.Button('Submit', button_color=('white', 'green'))]
]

window = sg.Window('Custom Window', layout, size=(300, 100), icon='icon.ico', theme='DarkAmber')

In this example, we have customized the size of the window to 300×100 pixels, set the title to ‘Custom Window’, added a custom icon (‘icon.ico’), and changed the theme to ‘DarkAmber’.

Conclusion
In this tutorial, we have introduced you to the basics of PySimpleGUI and shown you how to create simple GUI applications in Python. You can now start exploring the library and creating your own graphical user interfaces. PySimpleGUI offers a wide range of customization options and widgets, allowing you to create professional-looking windows for your applications.