def setUp(self): self.process = Mock() self.child = MagicMock() def getitem(name): return name self.child.__getitem__.side_effect = getitem self.params = ScanTickerPart.MethodMeta.prepare_input_map( name="AxisTwo", mri="mri") self.process.get_block.return_value = self.child self.o = ScanTickerPart(self.process, self.params)