progress-py

#!/usr/bin/env python3
from time import sleep
CURSOR_UP_ONE = '\x1b[1A'
ERASE_LINE = '\x1b[2K'


def rf():
    print(CURSOR_UP_ONE + ERASE_LINE + CURSOR_UP_ONE)


def p(i):
    print('[' + (i * '|') + ((70 - i) * ' ') + ']')


def main():
    state = 0
    cnt = 20
    i = 0
    while True:
        p(i)
        if i == 70:
            for i in range(5):
                for i in range(71):
                    sleep((i ** 0.9) * 0.0006)
                    rf()
                    p(i)
            sleep(3)
            rf()
            for i in range(70, 0, -1):
                p(i)
                sleep(1 / i)
                rf()
            exit()
        elif state == 0:
            i += 1
            cnt -= 1
            if cnt == 0:
                state = 1
                cnt = 18
        elif state == 1:
            i -= 1
            cnt -= 1
            if cnt == 0:
                state = 0
                cnt = 20
        sleep(0.01)
        rf()


if __name__ == '__main__':
    main()