remove LiteralType from 3.8

Author: KotlinIsland

.github/workflows/check.yaml

@@ -18,7 +18,7 @@ jobs:
         with:
           python-version: ${{ matrix.python-version }}
       - name: Run image
-        uses: abatilo/actions-poetry@v2
+        uses: abatilo/actions-poetry@v2.1.6
         with:
           poetry-version: ${{ env.POETRY_VERSION }}
       - run: poetry config virtualenvs.in-project true

basedtyping/runtime_only.py

@@ -8,7 +8,9 @@
 
 from typing_extensions import Final as Final_ext
 
-if sys.version_info >= (3, 8):
+if sys.version_info >= (3, 9):
+    # Despite the fact that Literal is in 3.8, it is just a _GenericAlias,
+    #  so would be broken
     from typing import Final, Literal
 
     LiteralType: Final = type(Literal[1])

tests/test_runtime_only/test_literal_type.py

@@ -1,12 +1,20 @@
 import sys
+from typing import Union
 
-if sys.version_info >= (3, 8):
-    from typing import Literal, Union
+import pytest
+
+
+@pytest.mark.skipif(sys.version_info < (3, 9))
+def test_literal_type_positive() -> None:
+    from typing import Literal
 
     from basedtyping.runtime_only import LiteralType
 
-    def test_literal_type_positive() -> None:
-        assert isinstance(Literal[1, 2], LiteralType)
+    assert isinstance(Literal[1, 2], LiteralType)
+
+
+@pytest.mark.skipif(sys.version_info < (3, 9))
+def test_literal_type_negative() -> None:
+    from basedtyping.runtime_only import LiteralType
 
-    def test_literal_type_negative() -> None:
-        assert not isinstance(Union[int, str], LiteralType)
+    assert not isinstance(Union[int, str], LiteralType)