Simple progress bar in Python.

progress_bar.py

class ProgressBar(object):
    def __init__(self, label='Progress', start_message=None, end_message=None,
                 chunk_full='#', chunk_empty='-', border='[]'):
        self.lb = label
        self.sm = start_message
        self.em = end_message
        self.cf = chunk_full
        self.ce = chunk_empty
        self.br = border

    def __enter__(self):
        return self

    def __exit__(self, exc_type, exc_val, exc_tb):
        print()

    def progress(self, value, suffix=None):
        text = '\r'+'{label} {progress:>3}% {left}{full}{empty}{right}{end}'.format(
            label=self.lb,
            progress=value,
            left=self.br[0],
            full=self.cf * value,
            empty=self.ce * (100 - value),
            right=self.br[-1],
            end=suffix if suffix is not None else '').strip()
        print(text, end='')


def test():
    import time
    with ProgressBar('Done:', start_message='Start', end_message='End') as pr:
        for i in range(0, 100+1, 4):
            time.sleep(0.1)
            pr.progress(i)