Remove code examples for Python 3.8 in `background_tasks`

docs/en/docs/tutorial/background-tasks.md

@@ -15,7 +15,7 @@ This includes, for example:
 
 First, import `BackgroundTasks` and define a parameter in your *path operation function* with a type declaration of `BackgroundTasks`:
 
-{* ../../docs_src/background_tasks/tutorial001.py hl[1,13] *}
+{* ../../docs_src/background_tasks/tutorial001_py39.py hl[1,13] *}
 
 **FastAPI** will create the object of type `BackgroundTasks` for you and pass it as that parameter.
 
@@ -31,13 +31,13 @@ In this case, the task function will write to a file (simulating sending an emai
 
 And as the write operation doesn't use `async` and `await`, we define the function with normal `def`:
 
-{* ../../docs_src/background_tasks/tutorial001.py hl[6:9] *}
+{* ../../docs_src/background_tasks/tutorial001_py39.py hl[6:9] *}
 
 ## Add the background task { #add-the-background-task }
 
 Inside of your *path operation function*, pass your task function to the *background tasks* object with the method `.add_task()`:
 
-{* ../../docs_src/background_tasks/tutorial001.py hl[14] *}
+{* ../../docs_src/background_tasks/tutorial001_py39.py hl[14] *}
 
 `.add_task()` receives as arguments:
 

docs_src/background_tasks/tutorial002_an.py

@@ -1,27 +0,0 @@
-from typing import Union
-
-from fastapi import BackgroundTasks, Depends, FastAPI
-from typing_extensions import Annotated
-
-app = FastAPI()
-
-
-def write_log(message: str):
-    with open("log.txt", mode="a") as log:
-        log.write(message)
-
-
-def get_query(background_tasks: BackgroundTasks, q: Union[str, None] = None):
-    if q:
-        message = f"found query: {q}\n"
-        background_tasks.add_task(write_log, message)
-    return q
-
-
-@app.post("/send-notification/{email}")
-async def send_notification(
-    email: str, background_tasks: BackgroundTasks, q: Annotated[str, Depends(get_query)]
-):
-    message = f"message to {email}\n"
-    background_tasks.add_task(write_log, message)
-    return {"message": "Message sent"}

tests/test_tutorial/test_background_tasks/test_tutorial001.py

@@ -3,7 +3,7 @@ from pathlib import Path
 
 from fastapi.testclient import TestClient
 
-from docs_src.background_tasks.tutorial001 import app
+from docs_src.background_tasks.tutorial001_py39 import app
 
 client = TestClient(app)
 

tests/test_tutorial/test_background_tasks/test_tutorial002.py

@@ -5,16 +5,15 @@ from pathlib import Path
 import pytest
 from fastapi.testclient import TestClient
 
-from ...utils import needs_py39, needs_py310
+from ...utils import needs_py310
 
 
 @pytest.fixture(
     name="client",
     params=[
-        "tutorial002",
+        "tutorial002_py39",
         pytest.param("tutorial002_py310", marks=needs_py310),
-        "tutorial002_an",
+        "tutorial002_an_py39",
-        pytest.param("tutorial002_an_py39", marks=needs_py39),
         pytest.param("tutorial002_an_py310", marks=needs_py310),
     ],
 )