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38 lines
1.0 KiB
Python
38 lines
1.0 KiB
Python
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from progressbar import ProgressBar, ETA, ReverseBar, Bar
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class DefaultProgressBar(ProgressBar):
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"""
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progressbar with predefined parameters
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"""
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def __init__(self, maxval, caption=''):
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widgets = [caption, Bar('>'), ' ', ETA(), ' ', ReverseBar('<')]
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super(DefaultProgressBar, self).__init__(widgets=widgets, maxval=maxval)
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def progress(gen, caption='', pb_class=DefaultProgressBar):
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"""
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Make a generator that displays a progress bar from
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generator gen, set caption and choose the class to
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use (DefaultProgressBar by default)
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Generator should have __len__ method returning it's
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size.
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Progress bar class constructor should take two
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parameters:
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* generator size
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* progress bar caption.
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It also should have start, update and finish methods.
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"""
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pbar = pb_class(len(gen), caption).start() if pb_class else None
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i = 0
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for elem in gen:
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if pbar:
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pbar.update(i)
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i += 1
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yield(elem)
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if pbar:
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pbar.finish()
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