# module_constant_def_ok As a developer I want to define $TYPE module constants In order to make hardcoded values more visible and to make it easier to change hardcoded values ```py CONSTANT: $TYPE = $VAL0 @exported def testEntry() -> i32: return 9 ``` ```py expect(9) ``` # module_constant_def_bad As a developer I want to receive a type error on an invalid assignment on a $TYPE module constant In order to make debugging easier ```py CONSTANT: $OTHER_TYPE = $VAL0 @exported def testEntry() -> i32: return 0 ``` ```py if TYPE_NAME.startswith('tuple_'): expect_type_error( 'Tuple element count mismatch', 'The given literal must fit the expected type', ) else: expect_type_error( 'Must be tuple', 'The given literal must fit the expected type', ) ```