Progressbar with Percentage Label?

This is possible using a ttk.Style. The idea is to modify the layout of the Horizontal.TProgressbar style (do the same with Vertical.TProgressbar for a vertical progressbar) to add a label inside the bar:

Usual Horizontal.TProgressbar layout:

[('Horizontal.Progressbar.trough',  {'children': [('Horizontal.Progressbar.pbar',     {'side': 'left', 'sticky': 'ns'})],   'sticky': 'nswe'})]

With an additional label:

[('Horizontal.Progressbar.trough',  {'children': [('Horizontal.Progressbar.pbar',     {'side': 'left', 'sticky': 'ns'})],   'sticky': 'nswe'}), ('Horizontal.Progressbar.label', {'sticky': 'nswe'})]

Then, the text of the label can be changed with style.configure.

Here is the code:

import tkinter as tkfrom tkinter import ttkroot = tk.Tk()style = ttk.Style(root)# add label in the layoutstyle.layout('text.Horizontal.TProgressbar',              [('Horizontal.Progressbar.trough',               {'children': [('Horizontal.Progressbar.pbar',                              {'side': 'left', 'sticky': 'ns'})],                'sticky': 'nswe'}),               ('Horizontal.Progressbar.label', {'sticky': ''})])# set initial textstyle.configure('text.Horizontal.TProgressbar', text='0 %')# create progressbarvariable = tk.DoubleVar(root)pbar = ttk.Progressbar(root, style='text.Horizontal.TProgressbar', variable=variable)pbar.pack()def increment():    pbar.step()  # increment progressbar     style.configure('text.Horizontal.TProgressbar',                     text='{:g} %'.format(variable.get()))  # update label    root.after(200, increment)increment()root.mainloop()