Creating Various PySimpleGUI Pop‑up Windows and a Simple File Compression Tool in Python

PySimpleGUI is a lightweight Python library that simplifies the creation of graphical user interfaces, making it ideal for automation tasks and quick prototyping.

Install the library with pip install pysimplegui and verify the installation by importing it in a Python session.

The library supports two window design patterns: a one‑shot window that appears once for alerts or data collection, and a persistent window that remains open until the user closes it, typically serving as the main interface.

Common popup functions include sg.popup('Message') , sg.popup_ok('OK button') , sg.popup_yes_no('Yes/No') , sg.popup_cancel('Cancel') , sg.popup_error('Error') , and sg.popup_auto_close('Auto‑close') , each customizable with parameters such as title, colors, and button labels.

For scrolling text, use sg.popup_scrolled(text, title='Title') , which automatically adds a scrollbar when the content exceeds the window size.

To capture user input, employ sg.popup_get_text('Prompt') or sg.popup_get_text('Prompt', password_char='*') for hidden password entry, with the returned value being None if the user cancels.

File and folder selection dialogs are provided by sg.popup_get_file() and sg.popup_get_folder() , allowing users to choose paths that are then returned to the program for further processing.

A progress bar can be displayed with sg.one_line_progress_meter('Title', i+1, total, 'Key', 'Description') , supporting orientation and color customization.

Combining these dialogs, the tutorial builds a simple compression tool: it first asks the user to select a folder, then to choose a destination zip file (using save_as=True and default_extension='zip' ), compresses the folder contents with the zipfile module, and finally shows the resulting archive size using sg.popup(f'Compressed size: {size} KB') .