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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 zero_one_loss_calc(TP, POP):
 """ Calculate zero-one loss. :param TP: true Positive :type TP : dict :param POP: population :type POP : int :return: zero_one loss as integer """

    try:
        length = POP
        return (length - sum(TP.values()))
    except Exception:
        return "None"