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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 _computeChart(chart, date):
 """ Internal function to return a new chart for a specific date using properties from old chart. """

    pos = chart.pos
    hsys = chart.hsys
    IDs = [obj.id for obj in chart.objects]
    return Chart(date, pos, IDs=IDs, hsys=hsys)