Python deprecated string formatting to percentage for floats from 0.0 to 1.0 [duplicate]

Question

I want to add bar_labels to plots generated by Matplotlib. The interface uses the old Python string formatting annotations to render the labels, for example:

Value: 0.8 → fmt="%.1f%%" → produces 0.8% as output

I am searching for an expression which also multiplies the value by 100, so that the example would result in 80,0%. It is unfortunately not possible to use more recent string format options that Python offers.

The format options have to be included in the function call, for example: ax.bar_label(ax.containers[0], fmt="%.1f%%")

See also in the documentation.

Answer 1

Try like

"{:.1%}".format(0.8)