How to Launch an App from a Python Function Using Tkinter

Discover how to effectively launch a Tkinter app from a Python function without losing your main application. This guide provides a clear solution to common issues with function calls and window management in Tkinter.
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How to Launch an App from a Python Function Using Tkinter

Are you trying to launch an app from a Python function but encountering unexpected behavior? If you're using Tkinter and your attempt to open a secondary window isn't working correctly, don't worry! In this guide, we will dive into the mechanics of launching an application from a Python function and resolve any complications you might face along the way.

Understanding the Problem

Example Code Structure

You might be working with the following setup:

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The Solution: Fixing the Function Call

Correcting the Function Call

To resolve this, you can modify the button command to the following:

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With this change, the pge1 function will only be executed when the button is clicked, rather than when the button itself is defined.

Alternative with Lambda Functions

If you need to pass arguments to your function or want to include parentheses for any reason, you can use a lambda function:

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Using Toplevel for New Windows

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Conclusion

With these adjustments, your Python application should work correctly, launching a new Tkinter application from a button click without disrupting your main interface. Remember, proper function referencing is crucial in tkinter applications to ensure that UI operations occur at the right moment. Happy coding!