#!/usr/bin/env python3

import click

ticks = ["▁", "▂", "▃", "▄", "▅", "▆", "▇", "█"]


def histogram(sequence):
    min_val = min(sequence)
    max_val = max(sequence)

    scale = (int(max_val - min_val) << 8) / (len(ticks) - 1)
    if scale < 1:
        scale = 1

    return [ticks[int((int(i - min_val) << 8) / scale)] for i in sequence]


@click.command()
@click.argument('numbers', nargs=-1, type=float)
def cli(numbers):
    h = histogram(numbers)
    print("".join(h))


if __name__ == "__main__":
    cli()