📝 Add source examples for Python 3.9 and 3.10 (#715)

* 📝 Add source examples for Python 3.9 and 3.10

* ✅ Add tests for new source examples for Python 3.9 and 3.10, still needs pytest markers

* ✅ Add tests for fastapi examples

* ✅ Update tests for FastAPI app testing, for Python 3.9 and 3.10, fixing multi-app testing conflicts

* ✅ Require Python 3.9 and 3.10 for tests

* ✅ Update tests with missing markers

tests/test_tutorial/test_delete/test_tutorial001_py310_tutorial002_py310.py

@@ -0,0 +1,88 @@
+from unittest.mock import patch
+
+from sqlmodel import create_engine
+
+from ...conftest import get_testing_print_function, needs_py310
+
+expected_calls = [
+    [
+        "Hero 1:",
+        {"id": 2, "name": "Spider-Boy", "secret_name": "Pedro Parqueador", "age": None},
+    ],
+    [
+        "Hero 2:",
+        {
+            "id": 7,
+            "name": "Captain North America",
+            "secret_name": "Esteban Rogelios",
+            "age": 93,
+        },
+    ],
+    [
+        "Updated hero 1:",
+        {
+            "id": 2,
+            "name": "Spider-Youngster",
+            "secret_name": "Pedro Parqueador",
+            "age": 16,
+        },
+    ],
+    [
+        "Updated hero 2:",
+        {
+            "id": 7,
+            "name": "Captain North America Except Canada",
+            "secret_name": "Esteban Rogelios",
+            "age": 110,
+        },
+    ],
+    [
+        "Hero: ",
+        {
+            "id": 2,
+            "name": "Spider-Youngster",
+            "secret_name": "Pedro Parqueador",
+            "age": 16,
+        },
+    ],
+    [
+        "Deleted hero:",
+        {
+            "id": 2,
+            "name": "Spider-Youngster",
+            "secret_name": "Pedro Parqueador",
+            "age": 16,
+        },
+    ],
+    ["There's no hero named Spider-Youngster"],
+]
+
+
+@needs_py310
+def test_tutorial001(clear_sqlmodel):
+    from docs_src.tutorial.delete import tutorial001_py310 as mod
+
+    mod.sqlite_url = "sqlite://"
+    mod.engine = create_engine(mod.sqlite_url)
+    calls = []
+
+    new_print = get_testing_print_function(calls)
+
+    with patch("builtins.print", new=new_print):
+        mod.main()
+    assert calls == expected_calls
+
+
+@needs_py310
+def test_tutorial002(clear_sqlmodel):
+    from docs_src.tutorial.delete import tutorial002_py310 as mod
+
+    mod.sqlite_url = "sqlite://"
+    mod.engine = create_engine(mod.sqlite_url)
+    calls = []
+
+    new_print = get_testing_print_function(calls)
+
+    with patch("builtins.print", new=new_print):
+        mod.main()
+    assert calls == expected_calls