python: add 3.11.py (TaskGroup, ExceptionGroup, tomllib, StrEnum); normalize 3.10.py to use passed() and proper context manager

Author: makelinux

python/3.10.py

@@ -0,0 +1,32 @@
+#!/usr/bin/env python3.10
+
+# https://docs.python.org/3.10/whatsnew/index.html
+
+from passed import passed
+
+num = 19
+assert bin(num) == '0b10011'
+assert num.bit_count() == 3
+
+#assertNoLogs
+
+class CtxManager1():
+    def __enter__(self):
+        return self
+    def __exit__(self, exc_type, exc, tb):
+        return False
+
+
+with (CtxManager1() as example1,
+      CtxManager1() as example2,
+):
+    pass
+
+
+match 1:
+    case 1:
+        pass
+    case _:
+        pass
+
+passed()

python/3.11.py

@@ -0,0 +1,61 @@
+#!/usr/bin/env python3.11
+
+# https://docs.python.org/3.11/whatsnew/3.11.html
+
+from passed import passed
+
+import asyncio
+import enum
+import tomllib
+
+
+# ExceptionGroup and except* (PEP 654)
+def _raise_exception_group() -> None:
+    raise ExceptionGroup(
+        "demo",
+        [ValueError("bad value"), TypeError("bad type")],
+    )
+
+
+handled_value_error = False
+handled_type_error = False
+
+try:
+    _raise_exception_group()
+except* ValueError as eg:
+    handled_value_error = True
+    # Each subgroup only contains the matched exception type
+    assert all(isinstance(e, ValueError) for e in eg.exceptions)
+except* TypeError as eg:
+    handled_type_error = True
+    assert all(isinstance(e, TypeError) for e in eg.exceptions)
+
+assert handled_value_error and handled_type_error
+
+
+# tomllib in the standard library (PEP 680)
+toml_text = """
+name = "alice"
+age = 42
+"""
+data = tomllib.loads(toml_text)
+assert data == {"name": "alice", "age": 42}
+
+# enum.StrEnum (bakes in str behavior)
+class Color(enum.StrEnum):
+    RED = "red"
+    BLUE = "blue"
+
+assert Color.RED == "red"
+assert isinstance(Color.BLUE, str)
+
+# asyncio.TaskGroup (structured concurrency)
+async def _tg_demo() -> int:
+    async with asyncio.TaskGroup() as tg:
+        task_one = tg.create_task(asyncio.sleep(0.01, result=1))
+        task_two = tg.create_task(asyncio.sleep(0.01, result=2))
+    return task_one.result() + task_two.result()
+
+assert asyncio.run(_tg_demo()) == 3
+
+passed()

python/Makefile

@@ -14,3 +14,5 @@ all:
 	-./3.7.py
 	./3.8.py
 	./3.9.py
+	./3.10.py
+	./3.11.py

python/README.md

@@ -1,7 +1,7 @@
 # Python features examples by releases
 
 ## [2.0 - 2.3](2.3.py), [2.4](2.4.py), [2.5](2.5.py), [2.6](2.6.py), [2.7](2.7.py)
-## [3.0](3.0.py), [3.1](3.1.py), [3.2](3.2.py), [3.3](3.3.py), [3.4](3.4.py), [3.5](3.5.py), [3.6](3.6.py), [3.7](3.7.py), [3.8](3.8.py), [3.9](3.9.py)
+## [3.0](3.0.py), [3.1](3.1.py), [3.2](3.2.py), [3.3](3.3.py), [3.4](3.4.py), [3.5](3.5.py), [3.6](3.6.py), [3.7](3.7.py), [3.8](3.8.py), [3.9](3.9.py), [3.10](3.10.py), [3.11](3.11.py)
 
 ## Features
 * Minimal and practical self descriptive as possible source code.