Updated code example for asyncio.gather (GH-20604) (GH-26119)

The previous example did not fully showcase the interest of using gather.

Here the example showcases "the result is an aggregate list of returned values".
(cherry picked from commit 56b8ea65d28bd865e2363e10e9f1c2ca3433ffc2)

Co-authored-by: josephernest <nouvellecollection@gmail.com>
Co-authored-by: josephernest <nouvellecollection@gmail.com>

diff --git a/Doc/library/asyncio-task.rst b/Doc/library/asyncio-task.rst
index 3f54ecb08efc1f8059c864186c44f6cf1d7ddbf4..69e965cfc1d2d3a46ca1edb770fa608d92214be4 100644 (file)
--- a/Doc/library/asyncio-task.rst
+++ b/Doc/library/asyncio-task.rst
@@ -358,32 +358,35 @@ Running Tasks Concurrently
       async def factorial(name, number):
           f = 1
           for i in range(2, number + 1):
-              print(f"Task {name}: Compute factorial({i})...")
+              print(f"Task {name}: Compute factorial({number}), currently i={i}...")
               await asyncio.sleep(1)
               f *= i
           print(f"Task {name}: factorial({number}) = {f}")
+          return f
 
       async def main():
           # Schedule three calls *concurrently*:
-          await asyncio.gather(
+          L = await asyncio.gather(
               factorial("A", 2),
               factorial("B", 3),
               factorial("C", 4),
           )
+          print(L)
 
       asyncio.run(main())
 
       # Expected output:
       #
-      #     Task A: Compute factorial(2)...
-      #     Task B: Compute factorial(2)...
-      #     Task C: Compute factorial(2)...
+      #     Task A: Compute factorial(2), currently i=2...
+      #     Task B: Compute factorial(3), currently i=2...
+      #     Task C: Compute factorial(4), currently i=2...
       #     Task A: factorial(2) = 2
-      #     Task B: Compute factorial(3)...
-      #     Task C: Compute factorial(3)...
+      #     Task B: Compute factorial(3), currently i=3...
+      #     Task C: Compute factorial(4), currently i=3...
       #     Task B: factorial(3) = 6
-      #     Task C: Compute factorial(4)...
+      #     Task C: Compute factorial(4), currently i=4...
       #     Task C: factorial(4) = 24
+      #     [2, 6, 24]
 
    .. note::
       If *return_exceptions* is False, cancelling gather() after it