Terminal loading animation using Braille patterns

README.md

Inspired by the animation when using gh run download

braille_loading.py

#!/usr/bin/env python3

import time

DELAY = 1/20

dot_order = [(0, 0), (0, 1), (0, 2), (1, 0), (1, 1), (1, 2), (0, 3), (1, 3)]

coordinates = set()

def toggle(pos):
    if pos in coordinates:
        coordinates.remove(pos)
    else:
        coordinates.add(pos)

def br(x0, y0):
    bits = sum(((x0+x, y0+y) in coordinates) << i for (i, (x, y)) in enumerate(dot_order))
    return chr(0x2800 + bits)

def update():
    print(f'\r{br(0, 0)}{br(2, 0)} ', end='')

loop = [(2, 0), (3, 0), (3, 1), (3, 2), (3, 3), (2, 3), (1, 3), (0, 3), (0, 2), (0, 1), (0, 0), (1, 0)]

length = 6

for pos in loop[:length]:
    toggle(pos)

try:
    while True:
        for i in range(len(loop)):
            toggle(loop[i % len(loop)])
            toggle(loop[(i+length) % len(loop)])
            update()
            time.sleep(DELAY)
except KeyboardInterrupt:
    print()