Why is Button parameter “command” executed when declared?

I’m new to Python and trying to write a program with tkinter. Why is the Hello-function below executed? As I understand it, the callback would only be executed when the button is pressed? I am very confused… >>> def Hello(): print("Hi there!") >>> hi=Button(frame,text="Hello",command=Hello()) Hi there! >>> Answers: Thank you for visiting the Q&A section … Read more

How can I convert canvas content to an image?

from Tkinter import * root = Tk() cv = Canvas(root) cv.create_rectangle(10,10,50,50) cv.pack() root.mainloop() I want to convert canvas content to a bitmap or other image, and then do other operations, such as rotating or scaling the image, or changing its coordinates. Bitmaps can improve efficiency to show if I am no longer drawing. What should … Read more