I reference the following article. http://www.egr.msu.edu/classes/ece480/capstone/spring15/group02/assets/docs/nsappnote.pdf

I have followed article's code, but it appears:

enter image description here

How can i solve this problem?


Did you spell it right? Python is case sensitive and if you are using Tkinter it's spelled Tk().

| improve this answer | |

Your Answer

By clicking “Post Your Answer”, you agree to our terms of service, privacy policy and cookie policy

Not the answer you're looking for? Browse other questions tagged or ask your own question.