A simple progress bar class written in Python.

progress_bar.py

import os


class ProgressBar:
    progress: int = 0

    def __init__(self) -> None:
        self.columns, self.lines = os.get_terminal_size()

    def update(self, progress: int):
        if progress > 100 or progress < 0:
            raise ValueError('Progress must be between 0 and 100.')

        self.progress = progress
        return self

    def draw(self) -> None:
        scaled_progress: int = self.progress * (self.columns - 20) // 100
        print('\033[42m\033[30m', end='')
        print('\033[?25l', end='')
        print('\rProgress: [' + ' ' * (3 - len(str(self.progress))) + str(self.progress) + '%]', end='')
        print('\033[0m', end='')
        print(' [' + '#' * scaled_progress + '.' * (self.columns - 20 - scaled_progress) + ']', end='')
        print('\033[?25h', end='')

    def clear(self) -> None:
        print('\r' + ' ' * self.columns, end='\r')

Example.