import time

def ss (ss):

    start = time.perf_counter()
    for i in range(ss):
        finsh = "▓" * (i + 1)
        need_do = "-" * (ss - (i + 1))
        progress = ((i + 1) / ss) * 100
        dur = time.perf_counter() - start
        print("\r{:^3.0f}%[{}->"
              "{}]{:.2f}s".format(progress, finsh, need_do, dur), end="")
        time.sleep(0.05)

t = [['a', 'b', 'c', 'd', 'e'],['a', 'b', 'c', 'd', 'e'],['a', 'b', 'c', 'd', 'e'],['a', 'b', 'c', 'd', 'e'],['a', 'b', 'c', 'd', 'e'],['a', 'b', 'c', 'd', 'e']]
ss(len(t))