✨ Support Python 3.13 and drop 3.8 compatibility

.github/workflows/test_and_publish.yaml

@@ -13,7 +13,7 @@ on:
 
 env:
   DEFAULT_LINUX: "slim"
-  DEFAULT_PYTHON: "3.12"
+  DEFAULT_PYTHON: "3.13"
   DEFAULT_SCHEMAS: "pydantic"
 
 jobs:
@@ -22,7 +22,7 @@ jobs:
     runs-on: ubuntu-latest
     strategy:
       matrix:
-        python: [ "3.8", "3.9", "3.10", "3.11", "3.12" ]
+        python: [ "3.9", "3.10", "3.11", "3.12", "3.13" ]
     container:
       image: python:${{ matrix.python }}
     steps:
@@ -101,7 +101,7 @@ jobs:
     strategy:
       matrix:
         linux: ["slim"]
-        python: ["3.8", "3.9", "3.10", "3.11", "3.12"]
+        python: ["3.9", "3.10", "3.11", "3.12", "3.13"]
         schemas: ["pydantic", "marshmallow", "typesystem"]
     steps:
       - name: Check out the repo

.github/workflows/test_pull_request_branch.yaml

@@ -10,7 +10,7 @@ jobs:
     runs-on: ubuntu-latest
     strategy:
       matrix:
-        python: ["3.8", "3.9", "3.10", "3.11", "3.12"]
+        python: ["3.9", "3.10", "3.11", "3.12", "3.13"]
     container:
       image: python:${{ matrix.python }}
     steps:

flama/concurrency.py

@@ -4,16 +4,6 @@
 import sys
 import typing as t
 
-if sys.version_info < (3, 9):  # PORT: Remove when stop supporting 3.8 # pragma: no cover
-    import contextvars
-
-    async def to_thread(func, /, *args, **kwargs):
-        return await asyncio.get_running_loop().run_in_executor(
-            None, functools.partial(contextvars.copy_context().run, func, *args, **kwargs)
-        )
-
-    asyncio.to_thread = to_thread  # pyright: ignore
-
 if sys.version_info < (3, 10):  # PORT: Remove when stop supporting 3.9 # pragma: no cover
     from typing_extensions import ParamSpec, TypeGuard
 
@@ -58,9 +48,7 @@ async def run(
     if is_async(func):
         return await func(*args, **kwargs)
 
-    return t.cast(
-        R, await asyncio.to_thread(func, *args, **kwargs)  # PORT: Remove when stop supporting 3.8 # type: ignore
-    )
+    return t.cast(R, await asyncio.to_thread(func, *args, **kwargs))
 
 
 if sys.version_info < (3, 11):  # PORT: Remove when stop supporting 3.10 # pragma: no cover