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building a graphical user interface

Label it

When it comes to adding a label to your GUI, use the tkinter Label widget. Create a new label, attach
You create it in code not unlike the way you create a button. Here’s the code it to the main window, give
to add a label to an existing GUI application. The label simply displays a it some text, and adjust the
string: label's height.

l = Label(app, text='When you are ready, click on the buttons!', height = 3)
l.pack()

Don't forget to pack() the widget.

Put the label code before
the code for the buttons
and the GUI will then look
like this.

Another variation replaces the text parameter with textvariable. If
you assign a special tkinter variable to this parameter, the label will change
whenever the value of the variable changes, automatically:

Create an “IntVar”.

num_good = IntVar()
num_good.set(0)
Associate
the “IntVar” l1 = Label(app, textvariable = num_good)
with the
label. l1.pack(side = 'left')

...

num_good.set(100)

Use the “set()” method to adjust the
value of the “IntVar”, and the GUI
updates, as if by magic.
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