tkinter set default size for new widget code example

Example 1: set window size tkinter

# Change window_name to the name of the window object, i.e. root
window_name.geometry("500x500")
# To ensure widgets resize:
widget_name.pack(fill="both", expand=True)

Example 2: my_frame1 = Frame(my_notebook, width=500 height=500 bg="black")

my_frame1 = Frame(my_notebook, width=500 height=500 bg="black")