Tkinter - Entry - Validation

I'll show you how to validate data in an Entry widget in Tkinter.

In the example project, we will set a limit of 5 characters maximum that can be entered in our entry widget. If our user tries to type in more than 5 characters, the entry widget won't show any additional characters.

0:00 Intro
0:52 Demo app
1:28 Starter code
1:56 Create a class
4:34 Add validation
10:32 Validation options
12:04 Validate command explanation
16:40 Validate clipboard data
17:55 Not allow numbers at the beginning
19:28 Register method
21:27 Closure

Documentation website:

#tkinter #pythongui #python3 #pythonguitutorial

[python-pyqt]

Great production, enjoyable teaching style. I'm looking foward to many more videos.

[govinej]

Very helpful tutorial as usual, I will be using it in my projects 👍

[mrkalvinbs]

Great video.
It would also be interesting to make a video teaching how to create an entry with a mask( year/month/day) and validate a date.

[harryterhuerne]

Hi JobinPy, thank you so much. It's a very interesting Video. Only one question: I'm trying to create your class in a different python file. Unfortunately it didn't work for me. I spent an hour or so to get it working. I think it's the root.register, which results in an error. Can you give me an example how to use your class in a different file, so I can make an instance of it in my main python file?

[Hubert]

thanks once again for a cool tkinter vid :)

[rainermuller-knoche]

Very nice tutorial, thats exact what I need, I am shure wrote the code exactly as you did but get errors
cant finde the code to copy from. May be I did a mistake. The link in the description get a 404 error

[bentsionben-david]

hi jobin.. every day we make count +=1 till your next video..

[qouserparveen]

Thank you
Please make video on autocompletion entry without class

[praveenremix]

after validation how delete character since backspace is not working

[bentsionben-david]

how to make multiple validation for different entry widgets? tnx 🙏🏻🙏🏻