Countdown calculator GUI using Python and Tkinter
Channel: UsaDaily- FreedomFlowTV
Date: 26/01/2023

This creates a simple GUI with a label, an entry box and a button. When the button is pressed, the "calculate" function is called, which uses the time entered in the entry box as the end time and calculates the time left until that end time by comparing it to the current time. The time left is then displayed in the label.

The calculate function also includes a try-except block that checks for a valid time format (YYYY-MM-DD HH:MM:SS) and display an error message if invalid format is used.

You could use this template and customize it to your needs. For example, you could add a feature that allows the user to choose a date and time using a date picker widget instead of manually entering the end time.

It's also worth noting that this example uses a very basic Tkinter GUI, and depending on your requirements, you may need to use other libraries like PyQt, wxPython, Kivy, PyForms and many more that are available to create more complex GUI.