The bar's built-in display won't always be what you want on screen. This step replaces it entirely with a hand-picked, explicit list of widgets.

.. demo:: tutorial/step4

The previous step let ProgressBar pick its own display based on max_value. Here the constructor gains a widgets=widgets argument, where widgets is a plain list built before the call: [progressbar.Percentage(), ' ', progressbar.Bar(), ' ', progressbar.ETA()]. Passing widgets overrides everything ProgressBar would otherwise have picked -- only what is listed is shown, in the order listed, including the plain ' ' strings used here to space the widgets apart.

Next: :doc:`step5`.