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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 _printable_id_code(self):
 """ Returns the code in a printable form, separating it into groups of three characters using a point between them. :return: the ID code in a printable form """

        code = super(ISWCCode, self)._printable_id_code()

        code1 = code[:3]
        code2 = code[3:6]
        code3 = code[-3:]

        return '%s.%s.%s' % (code1, code2, code3)