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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 new_datetime(d):
 """ Generate a safe datetime from a datetime.date or datetime.datetime object. """

    kw = [d.year, d.month, d.day]
    if isinstance(d, real_datetime):
        kw.extend([d.hour, d.minute, d.second, d.microsecond, d.tzinfo])
    return datetime(*kw)