progress_bar.py

import sys

class ProgressBar():

    def __init__(self, num_steps):
        self.num_steps = num_steps

    def progress(self, step):
        i = int(100.0 * step / self.num_steps)
        sys.stdout.write("\rProgress: [{0:100s}] {1:d}%".format('=' * i, i))
        sys.stdout.flush()
        if i == 100:
            sys.stdout.write("\n")