📝 Update source examples and docs from Python 3.9 to 3.10 (#14900)

docs_src/security/tutorial007_py310.py

@@ -0,0 +1,33 @@
+import secrets
+
+from fastapi import Depends, FastAPI, HTTPException, status
+from fastapi.security import HTTPBasic, HTTPBasicCredentials
+
+app = FastAPI()
+
+security = HTTPBasic()
+
+
+def get_current_username(credentials: HTTPBasicCredentials = Depends(security)):
+    current_username_bytes = credentials.username.encode("utf8")
+    correct_username_bytes = b"stanleyjobson"
+    is_correct_username = secrets.compare_digest(
+        current_username_bytes, correct_username_bytes
+    )
+    current_password_bytes = credentials.password.encode("utf8")
+    correct_password_bytes = b"swordfish"
+    is_correct_password = secrets.compare_digest(
+        current_password_bytes, correct_password_bytes
+    )
+    if not (is_correct_username and is_correct_password):
+        raise HTTPException(
+            status_code=status.HTTP_401_UNAUTHORIZED,
+            detail="Incorrect username or password",
+            headers={"WWW-Authenticate": "Basic"},
+        )
+    return credentials.username
+
+
+@app.get("/users/me")
+def read_current_user(username: str = Depends(get_current_username)):
+    return {"username": username}