def _init(self,name):
        self.NAME = name.upper()
        self.type_num = getattr(wrap,'NPY_'+self.NAME)
        assert_equal(self.type_num,typeinfo[self.NAME][1])
        self.dtype = typeinfo[self.NAME][-1]
        self.elsize = typeinfo[self.NAME][2] / 8
        self.dtypechar = typeinfo[self.NAME][0]