мой вопрос был глупым. Сердечно. Март c.
from tkinter import *
from tkinter.ttk import Progressbar
from tkinter import ttk
window = Tk()
window.title("Progressbar")
window.geometry('350x200')
bar = Progressbar(window, length=200,maximum=70, mode='indeterminate')
bar.grid(column=0, row=0)
#bar['value'] = 0 # Initialization on the left (value)
bar['value'] = 70 # Initialization on the right (value + maximum)
window.mainl oop ()