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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def iterprogress( sized_iterable ):
 """ Iterate something printing progress bar to stdout """

    pb = ProgressBar( 0, len( sized_iterable ) )
    for i, value in enumerate( sized_iterable ):
        yield value
        pb.update_and_print( i, sys.stderr )