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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 _set_attr_reg(self):
 """Helper method. Appends correct attribute registry, depending on TMOS version """

        tmos_v = self._meta_data['bigip']._meta_data['tmos_version']
        attributes = self._meta_data['attribute_registry']
        v12kind = 'tm:asm:policies:blocking-settings:blocking-settingcollectionstate'
        v11kind = 'tm:asm:policies:blocking-settings'
        builderv11 = 'tm:asm:policies:policy-builder:pbconfigstate'
        builderv12 = 'tm:asm:policies:policy-builder:policy-builderstate'
        if LooseVersion(tmos_v) < LooseVersion('12.0.0'):
            attributes[v11kind] = Blocking_Settings
            attributes[builderv11] = Policy_Builder
        else:
            attributes[v12kind] = Blocking_Settings
            attributes[builderv12] = Policy_Builder