from IPython.display import display
button = widgets.Button(description="Click Me!")
output = widgets.Output()

display(button, output)

def on_button_clicked(b):
    with output:
        output.clear_output()
        print("Button clicked.")

button.on_click(on_button_clicked)
		

int_range = widgets.IntSlider()
output2 = widgets.Output()

display(int_range, output2)

def on_value_change(change):
    with output2:
        output2.clear_output()
        print(change['new'])

# tigger callback when traits in the names are changed
int_range.observe(on_value_change, names=['value'], type='change')