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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 loss_maps_dt(self, dtype=F32):
 """ Return a composite data type for loss maps """

        ltypes = self.loss_dt(dtype).names
        lst = [('poe-%s' % poe, dtype) for poe in self.conditional_loss_poes]
        return numpy.dtype([(lt, lst) for lt in ltypes])