def progress_bar(finished, total, start_time=None, extra_info=None,
                 autocomplete=True, completion_string='/n'):
    '''
    Prints an ASCII progress bar.

    Each call to ``progress_bar`` will update the progress bar. An example
    of tracking the progress of a list of items would look like::

        job_list = [job1, job2, job3, ... jobN]
        total_jobs = len(job_list)

        #initialize the progress bar
        progress_bar(0, total_jobs)

        # do the jobs
        for i, job in enumerate(job_list):
            do_job(job)
            progress_bar(i + 1, total_jobs)

    Args:

        finished (int): Number of finished jobs.

        total (int): Total number of jobs.

        start_time (datetime): Start time, as a ``datetime.datetime`` object.
            Only required if you want to display execution time alongside
            the progress bar. If not provided, execution time is not shown.
        
        extra_info (str): A string containing extra information to be displayed
            at the end of the progbar string. Examples include the number of failed
            jobs, the name of the job batch currently being processed, etc.

        complete (bool): If `True`, will append `completion_string` to the end
            of the progbar string.

        completion_string (str): Will be appended to the progbar string if
            `complete` is `True`. Default is `'\n\n'`.

    '''
    pct = int(100. * finished / total)
    ticks = int(pct / 2)
    spaces = int(50 - ticks)
    if start_time is not None:
        elapsed = (datetime.now() - start_time).seconds
        minutes = int(elapsed / 60)
        seconds = int(elapsed % 60)
        minute_str = '0' * (2 - len(str(minutes))) + str(minutes)
        second_str = '0' * (2 - len(str(seconds))) + str(seconds)
        prog_bar = '\r({}/{}) |{}{}|  {}%  ({}:{})  '.format(finished, total,
            '|' * ticks, ' ' * spaces, pct, minute_str, second_str)
    else:
        prog_bar = '\r({}/{}) |{}{}|  {}%  '.format(finished, total,
            '|' * ticks, ' ' * spaces, pct)
    if extra_info is not None:
        prog_bar += str(extra_info)
    if autocomplete and finished == total:
        prog_bar += completion_string
    sys.stdout.write(prog_bar)
    sys.stdout.flush()
Prints an ASCII progress bar.

    Each call to ``progress_bar`` will update the progress bar. An example
    of tracking the progress of a list of items would look like::

        job_list = [job1, job2, job3, ... jobN]
        total_jobs = len(job_list)

        #initialize the progress bar
        progress_bar(0, total_jobs)

        # do the jobs
        for i, job in enumerate(job_list):
            do_job(job)
            progress_bar(i + 1, total_jobs)

    Args:

        finished (int): Number of finished jobs.

        total (int): Total number of jobs.

        start_time (datetime): Start time, as a ``datetime.datetime`` object.
            Only required if you want to display execution time alongside
            the progress bar. If not provided, execution time is not shown.
        
        extra_info (str): A string containing extra information to be displayed
            at the end of the progbar string. Examples include the number of failed
            jobs, the name of the job batch currently being processed, etc.

        complete (bool): If `True`, will append `completion_string` to the end
            of the progbar string.

        completion_string (str): Will be appended to the progbar string if
            `complete` is `True`. Default is `'\n\n'`.