Post final QA fixes

Author: bzaczynski

python-asyncio/README.md

@@ -1,3 +1,3 @@
-# Async I/O in Python: A Complete Walkthrough
+# Python's `asyncio`: A Hands-On Walkthrough
 
-This folder provides the code examples for the Real Python tutorial [Async I/O in Python: A Complete Walkthrough](https://realpython.com/async-io-python/).
+This folder provides the code examples for the Real Python tutorial [Python's `asyncio`: A Hands-On Walkthrough](https://realpython.com/async-io-python/).

python-asyncio/as_completed.py

@@ -2,11 +2,6 @@
 import time
 
 
-async def coro(numbers):
-    await asyncio.sleep(min(numbers))
-    return list(reversed(numbers))
-
-
 async def main():
     task1 = asyncio.create_task(coro([10, 5, 2]))
     task2 = asyncio.create_task(coro([3, 2, 1]))
@@ -18,4 +13,10 @@ async def main():
     print(f"Both tasks done: {all((task1.done(), task2.done()))}")
 
 
-asyncio.run(main())
+async def coro(numbers):
+    await asyncio.sleep(min(numbers))
+    return list(reversed(numbers))
+
+
+if __name__ == "__main__":
+    asyncio.run(main())

python-asyncio/countasync.py

@@ -1,17 +1,17 @@
 import asyncio
 
 
+async def main():
+    await asyncio.gather(count(), count(), count())
+
+
 async def count():
     print("One")
     await asyncio.sleep(1)
     print("Two")
     await asyncio.sleep(1)
 
 
-async def main():
-    await asyncio.gather(count(), count(), count())
-
-
 if __name__ == "__main__":
     import time
 

python-asyncio/countsync.py

@@ -1,18 +1,18 @@
 import time
 
 
+def main():
+    for _ in range(3):
+        count()
+
+
 def count():
     print("One")
     time.sleep(1)
     print("Two")
     time.sleep(1)
 
 
-def main():
-    for _ in range(3):
-        count()
-
-
 if __name__ == "__main__":
     start = time.perf_counter()
     main()

python-asyncio/except_group.py

@@ -1,6 +1,15 @@
 import asyncio
 
 
+async def main():
+    results = await asyncio.gather(
+        coro_a(), coro_b(), coro_c(), return_exceptions=True
+    )
+    exceptions = [e for e in results if isinstance(e, Exception)]
+    if exceptions:
+        raise ExceptionGroup("Errors", exceptions)
+
+
 async def coro_a():
     await asyncio.sleep(1)
     raise ValueError("Error in coro A")
@@ -16,20 +25,12 @@ async def coro_c():
     raise IndexError("Error in coro C")
 
 
-async def main():
-    results = await asyncio.gather(
-        coro_a(), coro_b(), coro_c(), return_exceptions=True
-    )
-    exceptions = [e for e in results if isinstance(e, Exception)]
-    if exceptions:
-        raise ExceptionGroup("Errors", exceptions)
-
-
-try:
-    asyncio.run(main())
-except* ValueError as ve_group:
-    print(f"[ValueError handled] {ve_group.exceptions}")
-except* TypeError as te_group:
-    print(f"[TypeError handled] {te_group.exceptions}")
-except* IndexError as ie_group:
-    print(f"[IndexError handled] {ie_group.exceptions}")
+if __name__ == "__main__":
+    try:
+        asyncio.run(main())
+    except* ValueError as ve_group:
+        print(f"[ValueError handled] {ve_group.exceptions}")
+    except* TypeError as te_group:
+        print(f"[TypeError handled] {te_group.exceptions}")
+    except* IndexError as ie_group:
+        print(f"[IndexError handled] {ie_group.exceptions}")

python-asyncio/gathers.py

@@ -2,11 +2,6 @@
 import time
 
 
-async def coro(numbers):
-    await asyncio.sleep(min(numbers))
-    return list(reversed(numbers))
-
-
 async def main():
     task1 = asyncio.create_task(coro([10, 5, 2]))
     task2 = asyncio.create_task(coro([3, 2, 1]))
@@ -17,5 +12,11 @@ async def main():
     return result
 
 
-result = asyncio.run(main())
-print(f"result: {result}")
+async def coro(numbers):
+    await asyncio.sleep(min(numbers))
+    return list(reversed(numbers))
+
+
+if __name__ == "__main__":
+    result = asyncio.run(main())
+    print(f"result: {result}")

python-asyncio/powers.py

@@ -1,23 +1,22 @@
 import asyncio
 
 
-async def powers_of_two(stop=10):
-    exponent = 0
-    while exponent < stop:
-        yield 2**exponent
-        exponent += 1
-        await asyncio.sleep(0.2)  # Simulate some asynchronous work
-
-
 async def main():
     g = []
     async for i in powers_of_two(5):
         g.append(i)
     print(g)
-
     f = [j async for j in powers_of_two(5) if not (j // 3 % 5)]
     print(f)
 
 
+async def powers_of_two(stop=10):
+    exponent = 0
+    while exponent < stop:
+        yield 2**exponent
+        exponent += 1
+        await asyncio.sleep(0.2)  # Simulate some asynchronous work
+
+
 if __name__ == "__main__":
     asyncio.run(main())

python-asyncio/requirements.txt

@@ -0,0 +1,9 @@
+aiohappyeyeballs==2.6.1
+aiohttp==3.12.14
+aiosignal==1.4.0
+attrs==25.3.0
+frozenlist==1.7.0
+idna==3.10
+multidict==6.6.3
+propcache==0.3.2
+yarl==1.20.1

python-asyncio/tasks.py

@@ -1,17 +1,18 @@
 import asyncio
 
 
-async def coro(numbers):
-    await asyncio.sleep(min(numbers))
-    return list(reversed(numbers))
-
-
 async def main():
     task = asyncio.create_task(coro([3, 2, 1]))
     print(f"{type(task) = }")
     print(f"{task.done() = }")
     return await task
 
 
-result = asyncio.run(main())
-print(f"result: {result}")
+async def coro(numbers):
+    await asyncio.sleep(min(numbers))
+    return list(reversed(numbers))
+
+
+if __name__ == "__main__":
+    result = asyncio.run(main())
+    print(f"result: {result}")

python-asyncio/websites.py

@@ -3,12 +3,6 @@
 import aiohttp
 
 
-async def check(url):
-    async with aiohttp.ClientSession() as session:
-        async with session.get(url) as response:
-            print(f"{url}: status -> {response.status}")
-
-
 async def main():
     websites = [
         "https://realpython.com",
@@ -18,4 +12,11 @@ async def main():
     await asyncio.gather(*(check(url) for url in websites))
 
 
-asyncio.run(main())
+async def check(url):
+    async with aiohttp.ClientSession() as session:
+        async with session.get(url) as response:
+            print(f"{url}: status -> {response.status}")
+
+
+if __name__ == "__main__":
+    asyncio.run(main())