README.md

This gist remixes this answer on StackOverflow. My changes:

• I changes the symbol from # to a unicode character that fills a whole character space - █.
• I added a % symbol after the numbers

This is an example:

progress_bar.py

def progressbar(it, prefix="", size=60, file=sys.stdout):
    count = len(it)
    def show(j):
        x = int(size*j/count)
        file.write("{}[{}{}] {}%/{}%\r".format(prefix, "█"*x, "."*(size-x), j, count))
        file.flush()
    show(0)
    for i, item in enumerate(it):
        yield item
        show(i+1)
    file.write("\n")
    file.flush()

I made a version that allows you to specify the symbols and empty space:

def progressbar(it, prefix="", symbol="█", empty=" ", size=60, out=sys.stdout):
    count = len(it)
    def show(j):
        x = int(size*j/count)
        print(f"{prefix}[{symbol*x}{empty*(size-x)}] {j}/{count}",
                end='\r', file=out, flush=True)
    show(0)
    for i, item in enumerate(it):
        yield item
        show(i+1)
    print("\n", flush=True, file=out)