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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 id_maker(obj):
 """ Makes an ID from the object's class name and the datetime now in ISO format. :param obj: the class from which to make the ID :return: ID """

    dtfmt = '%Y%m%d-%H%M%S'
    return '%s-%s' % (obj.__class__.__name__, datetime.now().strftime(dtfmt))