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Viewing changes to progress.py

  • Committer: Aaron Bentley
  • Date: 2005-05-20 22:50:42 UTC
  • Revision ID: abentley@bruiser-20050520225042-0e48c7c0eddc23f3
merged ETA changes

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progress.py
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#    Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
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import sys
 
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import datetime
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class Progress(object):
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    def __init__(self, units, current, total=None):
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        else:
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            return "%i %s" (self.current, self.units) 
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def progress_bar(progress):
 
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class ProgressBar(object):
 
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    def __init__(self):
 
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        self.start = None
 
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        object.__init__(self)
 
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    def __call__(self, progress):
 
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        if self.start is None:
 
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            self.start = datetime.datetime.now()
 
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        progress_bar(progress, start_time=self.start)
 
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def divide_timedelta(delt, divisor):
 
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    """Divides a timedelta object"""
 
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    return datetime.timedelta(float(delt.days)/divisor, 
 
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                              float(delt.seconds)/divisor, 
 
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                              float(delt.microseconds)/divisor)
 
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def str_tdelta(delt):
 
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    if delt is None:
 
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        return "-:--:--"
 
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    return str(datetime.timedelta(delt.days, delt.seconds))
 
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def get_eta(start_time, progress, enough_samples=20):
 
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    if start_time is None or progress.current == 0:
 
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        return None
 
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    elif progress.current < enough_samples:
 
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        return None
 
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    elapsed = datetime.datetime.now() - start_time
 
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    total_duration = divide_timedelta((elapsed) * long(progress.total), 
 
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                                      progress.current)
 
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    if elapsed < total_duration:
 
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        eta = total_duration - elapsed
 
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    else:
 
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        eta = total_duration - total_duration
 
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    return eta
 
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def progress_bar(progress, start_time=None):
 
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    eta = get_eta(start_time, progress)
 
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    if start_time is not None:
 
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        eta_str = " "+str_tdelta(eta)
 
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    else:
 
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        eta_str = ""
 
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    fmt = " %i of %i %s (%.1f%%)"
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    f = fmt % (progress.total, progress.total, progress.units, 100.0)
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    max = len(f)
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    cols = 77 - max
 
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    if start_time is not None:
 
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        cols -= len(eta_str)
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    markers = int (float(cols) * progress.current / progress.total)
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    txt = fmt % (progress.current, progress.total, progress.units,
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                 progress.percent)
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    sys.stderr.write("\r[%s%s]%s" % ('='*markers, ' '*(cols-markers), txt))
 
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    sys.stderr.write("\r[%s%s]%s%s" % ('='*markers, ' '*(cols-markers), txt, 
 
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                                       eta_str))
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def clear_progress_bar():
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    sys.stderr.write('\r%s\r' % (' '*79))